diff --git a/packages/neon/neon/lib/src/models/app_implementation.dart b/packages/neon/neon/lib/src/models/app_implementation.dart
index 7b0c628d..4ea33c1a 100644
--- a/packages/neon/neon/lib/src/models/app_implementation.dart
+++ b/packages/neon/neon/lib/src/models/app_implementation.dart
@@ -91,20 +91,23 @@ abstract class AppImplementation<T extends Bloc, R extends NextcloudAppOptions>
   }
 
   Widget buildIcon({
-    final Size size = const Size.square(32),
+    final double? size,
     final Color? color,
   }) =>
       Builder(
-        builder: (final context) => VectorGraphic(
-          width: size.width,
-          height: size.height,
-          colorFilter: ColorFilter.mode(color ?? Theme.of(context).colorScheme.primary, BlendMode.srcIn),
-          loader: AssetBytesLoader(
-            'assets/app.svg.vec',
-            packageName: 'neon_$id',
-          ),
-          semanticsLabel: AppLocalizations.of(context).nextcloudLogo,
-        ),
+        builder: (final context) {
+          final realSize = size ?? IconTheme.of(context).size;
+          return VectorGraphic(
+            width: realSize,
+            height: realSize,
+            colorFilter: ColorFilter.mode(color ?? Theme.of(context).colorScheme.primary, BlendMode.srcIn),
+            loader: AssetBytesLoader(
+              'assets/app.svg.vec',
+              packageName: 'neon_$id',
+            ),
+            semanticsLabel: AppLocalizations.of(context).nextcloudLogo,
+          );
+        },
       );
 
   @mustCallSuper
diff --git a/packages/neon/neon/lib/src/pages/home.dart b/packages/neon/neon/lib/src/pages/home.dart
index 5f9fad0e..a76f932a 100644
--- a/packages/neon/neon/lib/src/pages/home.dart
+++ b/packages/neon/neon/lib/src/pages/home.dart
@@ -14,11 +14,8 @@ import 'package:neon/src/widgets/app_bar.dart';
 import 'package:neon/src/widgets/drawer.dart';
 import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/unified_search_results.dart';
-import 'package:neon/src/widgets/user_avatar.dart';
 import 'package:provider/provider.dart';
 
-const kQuickBarWidth = kAvatarSize + 20;
-
 class HomePage extends StatefulWidget {
   const HomePage({
     super.key,
diff --git a/packages/neon/neon/lib/src/theme/sizes.dart b/packages/neon/neon/lib/src/theme/sizes.dart
new file mode 100644
index 00000000..b5e6c9eb
--- /dev/null
+++ b/packages/neon/neon/lib/src/theme/sizes.dart
@@ -0,0 +1,5 @@
+/// Used for large icons e.g. in the leading part of a ListTile.
+const largeIconSize = 40.0;
+
+/// Use for small icons e.g. in the subtitle part of a ListTile.
+const smallIconSize = 16.0;
diff --git a/packages/neon/neon/lib/src/widgets/app_bar.dart b/packages/neon/neon/lib/src/widgets/app_bar.dart
index 66782d4a..c6a15f39 100644
--- a/packages/neon/neon/lib/src/widgets/app_bar.dart
+++ b/packages/neon/neon/lib/src/widgets/app_bar.dart
@@ -13,7 +13,6 @@ import 'package:neon/src/widgets/account_switcher_button.dart';
 import 'package:neon/src/widgets/app_implementation_icon.dart';
 import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/linear_progress_indicator.dart';
-import 'package:neon/src/widgets/user_avatar.dart';
 import 'package:provider/provider.dart';
 import 'package:rxdart/rxdart.dart';
 
@@ -131,7 +130,6 @@ class _NeonAppBarState extends State<NeonAppBar> {
                             tooltip: AppLocalizations.of(context).searchCancel,
                             icon: const Icon(
                               Icons.close,
-                              size: kAvatarSize * 2 / 3,
                             ),
                           ),
                         ],
@@ -164,7 +162,6 @@ class SearchIconButton extends StatelessWidget {
         tooltip: AppLocalizations.of(context).search,
         icon: const Icon(
           Icons.search,
-          size: kAvatarSize * 2 / 3,
         ),
       );
 }
@@ -269,7 +266,6 @@ class _NotificationIconButtonState extends State<NotificationIconButton> {
                   color: unreadCount > 0
                       ? Theme.of(context).colorScheme.primary
                       : Theme.of(context).colorScheme.onBackground,
-                  size: const Size.square(kAvatarSize * 2 / 3),
                 ),
               );
             },
diff --git a/packages/neon/neon/lib/src/widgets/app_implementation_icon.dart b/packages/neon/neon/lib/src/widgets/app_implementation_icon.dart
index 457f35b2..240584f7 100644
--- a/packages/neon/neon/lib/src/widgets/app_implementation_icon.dart
+++ b/packages/neon/neon/lib/src/widgets/app_implementation_icon.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/widgets.dart';
 import 'package:meta/meta.dart';
 import 'package:neon/src/models/app_implementation.dart';
-import 'package:neon/src/widgets/user_avatar.dart';
 
 @internal
 class NeonAppImplementationIcon extends StatelessWidget {
@@ -9,7 +8,7 @@ class NeonAppImplementationIcon extends StatelessWidget {
     required this.appImplementation,
     this.unreadCount = 0,
     this.color,
-    this.size = const Size.square(kAvatarSize),
+    this.size,
     super.key,
   });
 
@@ -19,7 +18,7 @@ class NeonAppImplementationIcon extends StatelessWidget {
 
   final Color? color;
 
-  final Size size;
+  final double? size;
 
   @override
   Widget build(final BuildContext context) => Stack(
diff --git a/packages/neon/neon/lib/src/widgets/drawer_destination.dart b/packages/neon/neon/lib/src/widgets/drawer_destination.dart
index 57e3bc62..ddc1e98b 100644
--- a/packages/neon/neon/lib/src/widgets/drawer_destination.dart
+++ b/packages/neon/neon/lib/src/widgets/drawer_destination.dart
@@ -1,10 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:meta/meta.dart';
-import 'package:neon/src/widgets/user_avatar.dart';
 import 'package:rxdart/subjects.dart';
 
 @internal
-typedef DestinationIconBuilder = Widget Function({Size size, Color color});
+typedef DestinationIconBuilder = Widget Function({double? size, Color color});
 
 @internal
 class NeonNavigationDestination {
@@ -34,18 +33,17 @@ extension NavigationDestinationExtension on NavigationDestination {
 @internal
 extension NavigationRailDestinationExtension on NavigationRailDestination {
   static NavigationRailDestination fromNeonDestination(final NeonNavigationDestination neonDestination) {
-    final iconWIdget = StreamBuilder(
+    final iconWidget = StreamBuilder(
       stream: neonDestination.notificationCount,
       initialData: 0,
       builder: (final context, final snapshot) {
         final colorScheme = Theme.of(context).colorScheme;
 
         final color = snapshot.requireData > 0 ? colorScheme.primary : colorScheme.onBackground;
-        const size = Size.square(kAvatarSize * 2 / 3);
 
         final icon = Container(
           margin: const EdgeInsets.all(5),
-          child: neonDestination.icon(size: size, color: color),
+          child: neonDestination.icon(color: color),
         );
 
         if (snapshot.requireData <= 0) {
@@ -78,7 +76,7 @@ extension NavigationRailDestinationExtension on NavigationRailDestination {
 
     return NavigationRailDestination(
       label: Text(neonDestination.label),
-      icon: iconWIdget,
+      icon: iconWidget,
       selectedIcon: neonDestination.selectedIcon,
     );
   }
diff --git a/packages/neon/neon/lib/src/widgets/unified_search_results.dart b/packages/neon/neon/lib/src/widgets/unified_search_results.dart
index a496380d..2404c45e 100644
--- a/packages/neon/neon/lib/src/widgets/unified_search_results.dart
+++ b/packages/neon/neon/lib/src/widgets/unified_search_results.dart
@@ -7,13 +7,13 @@ import 'package:neon/src/bloc/result_builder.dart';
 import 'package:neon/src/blocs/accounts.dart';
 import 'package:neon/src/blocs/unified_search.dart';
 import 'package:neon/src/models/account.dart';
+import 'package:neon/src/theme/sizes.dart';
 import 'package:neon/src/widgets/cached_image.dart';
 import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/image_wrapper.dart';
 import 'package:neon/src/widgets/linear_progress_indicator.dart';
 import 'package:neon/src/widgets/list_view.dart';
 import 'package:neon/src/widgets/server_icon.dart';
-import 'package:neon/src/widgets/user_avatar.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:provider/provider.dart';
 
@@ -77,7 +77,7 @@ class NeonUnifiedSearchResults extends StatelessWidget {
               ListTile(
                 leading: const Icon(
                   Icons.close,
-                  size: kAvatarSize,
+                  size: largeIconSize,
                 ),
                 title: Text(AppLocalizations.of(context).searchNoResults),
               ),
@@ -85,7 +85,7 @@ class NeonUnifiedSearchResults extends StatelessWidget {
             for (final entry in entries) ...[
               ListTile(
                 leading: NeonImageWrapper(
-                  size: const Size.square(kAvatarSize),
+                  size: const Size.square(largeIconSize),
                   borderRadius: const BorderRadius.all(Radius.circular(8)),
                   child: _buildThumbnail(context, accountsBloc.activeAccount.value!, entry),
                 ),
@@ -105,7 +105,7 @@ class NeonUnifiedSearchResults extends StatelessWidget {
   Widget _buildThumbnail(final BuildContext context, final Account account, final CoreUnifiedSearchResultEntry entry) {
     if (entry.thumbnailUrl.isNotEmpty) {
       return NeonCachedImage.url(
-        size: const Size.square(kAvatarSize),
+        size: const Size.square(largeIconSize),
         url: entry.thumbnailUrl,
         account: account,
         // The thumbnail URL might be set but a 404 is returned because there is no preview available
@@ -121,7 +121,7 @@ class NeonUnifiedSearchResults extends StatelessWidget {
     final Account account,
     final CoreUnifiedSearchResultEntry entry,
   ) {
-    const size = Size.square(kAvatarSize * 2 / 3);
+    final size = Size.square(IconTheme.of(context).size!);
     if (entry.icon.startsWith('/')) {
       return NeonCachedImage.url(
         size: size,
diff --git a/packages/neon/neon/lib/src/widgets/user_avatar.dart b/packages/neon/neon/lib/src/widgets/user_avatar.dart
index 65949cd5..d5b0f0c3 100644
--- a/packages/neon/neon/lib/src/widgets/user_avatar.dart
+++ b/packages/neon/neon/lib/src/widgets/user_avatar.dart
@@ -8,20 +8,19 @@ import 'package:neon/src/bloc/result.dart';
 import 'package:neon/src/bloc/result_builder.dart';
 import 'package:neon/src/blocs/accounts.dart';
 import 'package:neon/src/models/account.dart';
+import 'package:neon/src/theme/sizes.dart';
 import 'package:neon/src/widgets/cached_image.dart';
 import 'package:neon/src/widgets/server_icon.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:provider/provider.dart';
 import 'package:rxdart/rxdart.dart';
 
-const kAvatarSize = 40.0;
-
 class NeonUserAvatar extends StatefulWidget {
   NeonUserAvatar({
     required this.account,
     final String? username,
     this.showStatus = true,
-    this.size = kAvatarSize,
+    this.size,
     this.backgroundColor,
     this.foregroundColor,
     super.key,
@@ -30,7 +29,7 @@ class NeonUserAvatar extends StatefulWidget {
   final Account account;
   final String username;
   final bool showStatus;
-  final double size;
+  final double? size;
   final Color? backgroundColor;
   final Color? foregroundColor;
 
@@ -55,7 +54,7 @@ class _UserAvatarState extends State<NeonUserAvatar> {
   Widget build(final BuildContext context) => LayoutBuilder(
         builder: (final context, final constraints) {
           final brightness = Theme.of(context).brightness;
-          size = constraints.constrain(Size.square(widget.size)).shortestSide;
+          size = constraints.constrain(Size.square(widget.size ?? largeIconSize)).shortestSide;
           final pixelSize = (size * MediaQuery.of(context).devicePixelRatio).toInt();
           return Stack(
             alignment: Alignment.center,
diff --git a/packages/neon/neon/lib/theme.dart b/packages/neon/neon/lib/theme.dart
index 8b4281ab..71bd3452 100644
--- a/packages/neon/neon/lib/theme.dart
+++ b/packages/neon/neon/lib/theme.dart
@@ -3,3 +3,4 @@ export 'src/theme/color_scheme.dart';
 export 'src/theme/colors.dart';
 export 'src/theme/dialog.dart';
 export 'src/theme/neon.dart';
+export 'src/theme/sizes.dart';
diff --git a/packages/neon/neon_files/lib/neon_files.dart b/packages/neon/neon_files/lib/neon_files.dart
index 1c63d961..026b2165 100644
--- a/packages/neon/neon_files/lib/neon_files.dart
+++ b/packages/neon/neon_files/lib/neon_files.dart
@@ -18,6 +18,7 @@ import 'package:neon/nextcloud.dart';
 import 'package:neon/platform.dart';
 import 'package:neon/settings.dart';
 import 'package:neon/sort_box.dart';
+import 'package:neon/theme.dart';
 import 'package:neon/utils.dart';
 import 'package:neon/widgets.dart';
 import 'package:neon_files/l10n/localizations.dart';
diff --git a/packages/neon/neon_files/lib/widgets/browser_view.dart b/packages/neon/neon_files/lib/widgets/browser_view.dart
index fe2ef75e..3f2e4d4f 100644
--- a/packages/neon/neon_files/lib/widgets/browser_view.dart
+++ b/packages/neon/neon_files/lib/widgets/browser_view.dart
@@ -130,14 +130,9 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                                   children: <Widget>[
                                     IconButton(
                                       padding: EdgeInsets.zero,
-                                      visualDensity: const VisualDensity(
-                                        horizontal: VisualDensity.minimumDensity,
-                                        vertical: VisualDensity.minimumDensity,
-                                      ),
                                       tooltip: AppLocalizations.of(context).goToPath(''),
                                       icon: const Icon(
                                         Icons.house,
-                                        size: 30,
                                       ),
                                       onPressed: () {
                                         widget.bloc.setPath([]);
@@ -167,7 +162,6 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                                       .intersperse(
                                         const Icon(
                                           Icons.keyboard_arrow_right,
-                                          size: 30,
                                         ),
                                       )
                                       .toList(),
diff --git a/packages/neon/neon_files/lib/widgets/file_list_tile.dart b/packages/neon/neon_files/lib/widgets/file_list_tile.dart
index f44db77e..a9d09c4a 100644
--- a/packages/neon/neon_files/lib/widgets/file_list_tile.dart
+++ b/packages/neon/neon_files/lib/widgets/file_list_tile.dart
@@ -1,6 +1,7 @@
 import 'package:filesize/filesize.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
+import 'package:neon/theme.dart';
 import 'package:neon/utils.dart';
 import 'package:neon/widgets.dart';
 import 'package:neon_files/l10n/localizations.dart';
@@ -75,7 +76,7 @@ class FileListTile extends StatelessWidget {
         trailing: !details.hasTask && mode != FilesBrowserMode.noActions
             ? FileActions(details: details)
             : const SizedBox.square(
-                dimension: 48,
+                dimension: largeIconSize,
               ),
       );
 }
@@ -126,7 +127,7 @@ class _FileIcon extends StatelessWidget {
             alignment: Alignment.bottomRight,
             child: Icon(
               Icons.star,
-              size: 14,
+              size: smallIconSize,
               color: Colors.yellow,
             ),
           ),
@@ -135,7 +136,7 @@ class _FileIcon extends StatelessWidget {
     }
 
     return SizedBox.square(
-      dimension: 40,
+      dimension: largeIconSize,
       child: icon,
     );
   }
diff --git a/packages/neon/neon_files/lib/widgets/file_preview.dart b/packages/neon/neon_files/lib/widgets/file_preview.dart
index 118a474f..f1cebde2 100644
--- a/packages/neon/neon_files/lib/widgets/file_preview.dart
+++ b/packages/neon/neon_files/lib/widgets/file_preview.dart
@@ -4,7 +4,7 @@ class FilePreview extends StatelessWidget {
   const FilePreview({
     required this.bloc,
     required this.details,
-    this.size = const Size.square(40),
+    this.size = const Size.square(largeIconSize),
     this.color,
     this.borderRadius,
     this.withBackground = false,
diff --git a/packages/neon/neon_news/lib/neon_news.dart b/packages/neon/neon_news/lib/neon_news.dart
index de7c26c7..f8d999db 100644
--- a/packages/neon/neon_news/lib/neon_news.dart
+++ b/packages/neon/neon_news/lib/neon_news.dart
@@ -15,6 +15,7 @@ import 'package:neon/nextcloud.dart';
 import 'package:neon/platform.dart';
 import 'package:neon/settings.dart';
 import 'package:neon/sort_box.dart';
+import 'package:neon/theme.dart';
 import 'package:neon/utils.dart';
 import 'package:neon/widgets.dart';
 import 'package:neon_news/l10n/localizations.dart';
diff --git a/packages/neon/neon_news/lib/widgets/articles_view.dart b/packages/neon/neon_news/lib/widgets/articles_view.dart
index e9d9abb9..1a5fab1e 100644
--- a/packages/neon/neon_news/lib/widgets/articles_view.dart
+++ b/packages/neon/neon_news/lib/widgets/articles_view.dart
@@ -131,7 +131,7 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
               ),
               child: NewsFeedIcon(
                 feed: feed,
-                size: 16,
+                size: smallIconSize,
                 borderRadius: const BorderRadius.all(Radius.circular(2)),
               ),
             ),
diff --git a/packages/neon/neon_news/lib/widgets/feed_icon.dart b/packages/neon/neon_news/lib/widgets/feed_icon.dart
index ea336f30..f47c7058 100644
--- a/packages/neon/neon_news/lib/widgets/feed_icon.dart
+++ b/packages/neon/neon_news/lib/widgets/feed_icon.dart
@@ -3,7 +3,7 @@ part of '../neon_news.dart';
 class NewsFeedIcon extends StatelessWidget {
   const NewsFeedIcon({
     required this.feed,
-    this.size = 48,
+    this.size = largeIconSize,
     this.borderRadius,
     super.key,
   });
diff --git a/packages/neon/neon_news/lib/widgets/folders_view.dart b/packages/neon/neon_news/lib/widgets/folders_view.dart
index 058f70d0..b85a76ff 100644
--- a/packages/neon/neon_news/lib/widgets/folders_view.dart
+++ b/packages/neon/neon_news/lib/widgets/folders_view.dart
@@ -53,12 +53,12 @@ class NewsFoldersView extends StatelessWidget {
       ),
       subtitle: unreadCount > 0 ? Text(AppLocalizations.of(context).articlesUnread(unreadCount)) : const SizedBox(),
       leading: SizedBox.square(
-        dimension: 48,
+        dimension: largeIconSize,
         child: Stack(
           children: [
             Icon(
               Icons.folder,
-              size: 48,
+              size: largeIconSize,
               color: Theme.of(context).colorScheme.primary,
             ),
             Center(
diff --git a/packages/neon/neon_notes/lib/neon_notes.dart b/packages/neon/neon_notes/lib/neon_notes.dart
index 6ebd227b..32309451 100644
--- a/packages/neon/neon_notes/lib/neon_notes.dart
+++ b/packages/neon/neon_notes/lib/neon_notes.dart
@@ -14,6 +14,7 @@ import 'package:neon/models.dart';
 import 'package:neon/nextcloud.dart';
 import 'package:neon/settings.dart';
 import 'package:neon/sort_box.dart';
+import 'package:neon/theme.dart';
 import 'package:neon/utils.dart';
 import 'package:neon/widgets.dart';
 import 'package:neon_notes/l10n/localizations.dart';
diff --git a/packages/neon/neon_notes/lib/widgets/categories_view.dart b/packages/neon/neon_notes/lib/widgets/categories_view.dart
index 2522cab6..2c1a741b 100644
--- a/packages/neon/neon_notes/lib/widgets/categories_view.dart
+++ b/packages/neon/neon_notes/lib/widgets/categories_view.dart
@@ -46,10 +46,10 @@ class NotesCategoriesView extends StatelessWidget {
         leading: category.name.isNotEmpty
             ? Icon(
                 MdiIcons.tag,
-                size: 40,
+                size: largeIconSize,
                 color: NotesCategoryColor.compute(category.name),
               )
-            : const SizedBox.square(dimension: 40),
+            : const SizedBox.square(dimension: largeIconSize),
         onTap: () async {
           await Navigator.of(context).push(
             MaterialPageRoute(
diff --git a/packages/neon/neon_notes/lib/widgets/notes_view.dart b/packages/neon/neon_notes/lib/widgets/notes_view.dart
index 03ef7266..ecebf9bf 100644
--- a/packages/neon/neon_notes/lib/widgets/notes_view.dart
+++ b/packages/neon/neon_notes/lib/widgets/notes_view.dart
@@ -50,7 +50,7 @@ class NotesView extends StatelessWidget {
               ),
               Icon(
                 MdiIcons.tag,
-                size: 14,
+                size: smallIconSize,
                 color: NotesCategoryColor.compute(note.category),
               ),
               const SizedBox(
diff --git a/packages/neon/neon_notifications/lib/neon_notifications.dart b/packages/neon/neon_notifications/lib/neon_notifications.dart
index c2a5d210..a795f8a7 100644
--- a/packages/neon/neon_notifications/lib/neon_notifications.dart
+++ b/packages/neon/neon_notifications/lib/neon_notifications.dart
@@ -9,6 +9,7 @@ import 'package:neon/blocs.dart';
 import 'package:neon/models.dart';
 import 'package:neon/nextcloud.dart';
 import 'package:neon/settings.dart';
+import 'package:neon/theme.dart';
 import 'package:neon/utils.dart';
 import 'package:neon/widgets.dart';
 import 'package:neon_notifications/l10n/localizations.dart';
diff --git a/packages/neon/neon_notifications/lib/pages/main.dart b/packages/neon/neon_notifications/lib/pages/main.dart
index 0d2172c5..39cdd284 100644
--- a/packages/neon/neon_notifications/lib/pages/main.dart
+++ b/packages/neon/neon_notifications/lib/pages/main.dart
@@ -74,13 +74,13 @@ class _NotificationsMainPageState extends State<NotificationsMainPage> {
       ),
       leading: app != null
           ? app.buildIcon(
-              size: const Size.square(40),
+              size: largeIconSize,
             )
           : SizedBox.fromSize(
-              size: const Size.square(40),
+              size: const Size.square(largeIconSize),
               child: NeonCachedImage.url(
                 url: notification.icon!,
-                size: const Size.square(40),
+                size: const Size.square(largeIconSize),
                 svgColor: Theme.of(context).colorScheme.primary,
               ),
             ),