diff --git a/lib/widgets/message_list.dart b/lib/widgets/message_list.dart
index 090465f14a..d9e3dbf0e9 100644
--- a/lib/widgets/message_list.dart
+++ b/lib/widgets/message_list.dart
@@ -841,6 +841,9 @@ String formatHeaderDate(
 }
 
 /// A Zulip message, showing the sender's name and avatar if specified.
+// Design referenced from:
+//   - https://github.com/zulip/zulip-mobile/issues/5511
+//   - https://www.figma.com/file/1JTNtYo9memgW7vV6d0ygq/Zulip-Mobile?node-id=538%3A20849&mode=dev
 class MessageWithPossibleSender extends StatelessWidget {
   const MessageWithPossibleSender({super.key, required this.item});
 
@@ -849,49 +852,69 @@ class MessageWithPossibleSender extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final message = item.message;
-    final time = _kMessageTimestampFormat
-      .format(DateTime.fromMillisecondsSinceEpoch(1000 * message.timestamp));
+
+    Widget? senderRow;
+    if (item.showSender) {
+      final time = _kMessageTimestampFormat
+        .format(DateTime.fromMillisecondsSinceEpoch(1000 * message.timestamp));
+      senderRow = Row(
+        mainAxisAlignment: MainAxisAlignment.spaceBetween,
+        crossAxisAlignment: CrossAxisAlignment.baseline,
+        textBaseline: TextBaseline.alphabetic,
+        children: [
+          Flexible(
+            child: GestureDetector(
+              onTap: () => Navigator.push(context,
+                ProfilePage.buildRoute(context: context,
+                  userId: message.senderId)),
+              child: Row(
+                children: [
+                  Avatar(size: 32, borderRadius: 3,
+                    userId: message.senderId),
+                  const SizedBox(width: 8),
+                  Flexible(
+                    child: Text(message.senderFullName, // TODO get from user data
+                      style: const TextStyle(
+                        fontFamily: 'Source Sans 3',
+                        fontSize: 18,
+                        height: (22 / 18),
+                      ).merge(weightVariableTextStyle(context, wght: 600,
+                                wghtIfPlatformRequestsBold: 900)),
+                      overflow: TextOverflow.ellipsis)),
+                ]))),
+          const SizedBox(width: 4),
+          Text(time,
+            style: TextStyle(
+              color: _kMessageTimestampColor,
+              fontFamily: 'Source Sans 3',
+              fontSize: 16,
+              height: (18 / 16),
+              fontFeatures: const [FontFeature.enable('c2sc'), FontFeature.enable('smcp')],
+            ).merge(weightVariableTextStyle(context))),
+        ]);
+    }
 
     return GestureDetector(
       behavior: HitTestBehavior.translucent,
       onLongPress: () => showMessageActionSheet(context: context, message: message),
-      // TODO clean up this layout, by less precisely imitating web
       child: Padding(
-        padding: const EdgeInsets.only(top: 2, bottom: 3, left: 8, right: 8),
-        child: Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
-          item.showSender
-            ? Padding(
-                padding: const EdgeInsets.fromLTRB(3, 6, 11, 0),
-                child: GestureDetector(
-                  onTap: () => Navigator.push(context,
-                    ProfilePage.buildRoute(context: context,
-                      userId: message.senderId)),
-                  child: Avatar(size: 35, borderRadius: 4,
-                    userId: message.senderId)))
-            : const SizedBox(width: 3 + 35 + 11),
-          Expanded(
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.stretch,
-              children: [
-                if (item.showSender) ...[
-                  const SizedBox(height: 3),
-                  GestureDetector(
-                    onTap: () => Navigator.push(context,
-                      ProfilePage.buildRoute(context: context,
-                        userId: message.senderId)),
-                    child: Text(message.senderFullName, // TODO get from user data
-                      style: const TextStyle(fontWeight: FontWeight.bold))),
-                  const SizedBox(height: 4),
-                ],
-                MessageContent(message: message, content: item.content),
-                if ((message.reactions?.total ?? 0) > 0)
-                  ReactionChipsList(messageId: message.id, reactions: message.reactions!)
-              ])),
-          Container(
-            width: 80,
-            padding: const EdgeInsets.only(top: 4, right: 16 - 8),
-            alignment: Alignment.topRight,
-            child: Text(time, style: _kMessageTimestampStyle)),
+        padding: const EdgeInsets.symmetric(vertical: 4),
+        child: Column(children: [
+          if (senderRow != null)
+            Padding(padding: const EdgeInsets.fromLTRB(16, 2, 16, 4),
+              child: senderRow),
+          Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
+            const SizedBox(width: 16),
+            Expanded(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.stretch,
+                children: [
+                  MessageContent(message: message, content: item.content),
+                  if ((message.reactions?.total ?? 0) > 0)
+                    ReactionChipsList(messageId: message.id, reactions: message.reactions!)
+                ])),
+            const SizedBox(width: 16),
+          ]),
         ])));
   }
 }
@@ -899,11 +922,7 @@ class MessageWithPossibleSender extends StatelessWidget {
 // TODO web seems to ignore locale in formatting time, but we could do better
 final _kMessageTimestampFormat = DateFormat('h:mm aa', 'en_US');
 
-// TODO this seems to come out lighter than on web
-final _kMessageTimestampStyle = TextStyle(
-  fontSize: 12,
-  fontWeight: FontWeight.w400,
-  color: const HSLColor.fromAHSL(0.4, 0, 0, 0.2).toColor());
+final _kMessageTimestampColor = const HSLColor.fromAHSL(1, 0, 0, 0.5).toColor();
 
 Future<void> markNarrowAsRead(BuildContext context, Narrow narrow) async {
   final store = PerAccountStoreWidget.of(context);
diff --git a/test/widgets/message_list_test.dart b/test/widgets/message_list_test.dart
index 819145b4a0..f116ac5fcd 100644
--- a/test/widgets/message_list_test.dart
+++ b/test/widgets/message_list_test.dart
@@ -86,8 +86,8 @@ void main() {
 
     testWidgets('basic', (tester) async {
       await setupMessageListPage(tester, foundOldest: false,
-        messages: List.generate(200, (i) => eg.streamMessage(id: 950 + i, sender: eg.selfUser)));
-      check(itemCount(tester)).equals(203);
+        messages: List.generate(300, (i) => eg.streamMessage(id: 950 + i, sender: eg.selfUser)));
+      check(itemCount(tester)).equals(303);
 
       // Fling-scroll upward...
       await tester.fling(find.byType(MessageListPage), const Offset(0, 300), 8000);
@@ -100,7 +100,7 @@ void main() {
       await tester.pump(Duration.zero); // Allow a frame for the response to arrive.
 
       // Now we have more messages.
-      check(itemCount(tester)).equals(303);
+      check(itemCount(tester)).equals(403);
     });
 
     testWidgets('observe double-fetch glitch', (tester) async {