diff --git a/app/database.py b/app/database.py
index 6cbf30e..148533c 100644
--- a/app/database.py
+++ b/app/database.py
@@ -51,6 +51,7 @@ class Database:
             ('delivery_attempt', 'INTEGER'),
             ('delivery_max_attempts', 'INTEGER'),
             ('delivery_path', 'TEXT'),
+            ('delivery_path_hash_size', 'INTEGER DEFAULT 1'),
         ]:
             if col not in dm_columns:
                 conn.execute(f"ALTER TABLE direct_messages ADD COLUMN {col} {typedef}")
@@ -788,13 +789,15 @@ class Database:
             return dict(row) if row else None
 
     def update_dm_delivery_info(self, dm_id: int, attempt: int,
-                                max_attempts: int, path: str):
-        """Store successful delivery details (attempt number, path used)."""
+                                max_attempts: int, path: str,
+                                hash_size: int = 1):
+        """Store successful delivery details (attempt number, path used, hop byte size)."""
         with self._connect() as conn:
             conn.execute(
                 "UPDATE direct_messages SET delivery_attempt=?, "
-                "delivery_max_attempts=?, delivery_path=? WHERE id=?",
-                (attempt, max_attempts, path, dm_id))
+                "delivery_max_attempts=?, delivery_path=?, delivery_path_hash_size=? "
+                "WHERE id=?",
+                (attempt, max_attempts, path, hash_size, dm_id))
 
     def update_dm_delivery_status(self, dm_id: int, status: str):
         """Mark message delivery as failed."""
diff --git a/app/device_manager.py b/app/device_manager.py
index 8cc4f3e..849aabe 100644
--- a/app/device_manager.py
+++ b/app/device_manager.py
@@ -779,7 +779,8 @@ class DeviceManager:
                 ctx = self._retry_context.pop(dm_id, None)
                 if ctx:
                     self.db.update_dm_delivery_info(
-                        dm_id, ctx['attempt'], ctx['max_attempts'], ctx['path'])
+                        dm_id, ctx['attempt'], ctx['max_attempts'], ctx['path'],
+                        ctx.get('hash_size', 1))
                     if self.socketio:
                         self.socketio.emit('dm_delivered_info', {
                             'dm_id': dm_id,
@@ -980,7 +981,8 @@ class DeviceManager:
                             disc_hash_size = path_hash_mode + 1
                         if ctx:
                             self.db.update_dm_delivery_info(
-                                dm_id, ctx['attempt'], ctx['max_attempts'], discovered_path)
+                                dm_id, ctx['attempt'], ctx['max_attempts'], discovered_path,
+                                disc_hash_size)
                             if self.socketio:
                                 self.socketio.emit('dm_delivered_info', {
                                     'dm_id': dm_id,
@@ -1018,7 +1020,8 @@ class DeviceManager:
                     if recent:
                         self.db.update_dm_delivery_info(
                             recent['id'], recent['delivery_attempt'],
-                            recent['delivery_max_attempts'], discovered_path)
+                            recent['delivery_max_attempts'], discovered_path,
+                            backfill_hash_size)
                         if self.socketio:
                             self.socketio.emit('dm_delivered_info', {
                                 'dm_id': recent['id'],
@@ -1651,7 +1654,8 @@ class DeviceManager:
                 dm_id,
                 dm.get('delivery_attempt') or 1,
                 dm.get('delivery_max_attempts') or 1,
-                path_hex)
+                path_hex,
+                bf_hash_size)
             if self.socketio:
                 self.socketio.emit('dm_delivered_info', {
                     'dm_id': dm_id,
@@ -1960,7 +1964,8 @@ class DeviceManager:
         ctx = self._retry_context.pop(dm_id, None)
         if ctx:
             self.db.update_dm_delivery_info(
-                dm_id, ctx['attempt'], ctx['max_attempts'], ctx['path'])
+                dm_id, ctx['attempt'], ctx['max_attempts'], ctx['path'],
+                ctx.get('hash_size', 1))
 
         # Mark delivery_status so reloading messages from DB shows delivered
         self.db.update_dm_delivery_status(dm_id, 'delivered')
diff --git a/app/routes/api.py b/app/routes/api.py
index a9f248c..29c0881 100644
--- a/app/routes/api.py
+++ b/app/routes/api.py
@@ -2274,6 +2274,7 @@ def get_dm_messages():
                     'delivery_attempt': row.get('delivery_attempt'),
                     'delivery_max_attempts': row.get('delivery_max_attempts'),
                     'delivery_path': row.get('delivery_path'),
+                    'delivery_path_hash_size': row.get('delivery_path_hash_size') or 1,
                     'conversation_id': conversation_id,
                 })
         else:
diff --git a/app/static/js/dm.js b/app/static/js/dm.js
index c17d216..6fb934a 100644
--- a/app/static/js/dm.js
+++ b/app/static/js/dm.js
@@ -1234,7 +1234,7 @@ function displayMessages(messages) {
                 if (msg.delivery_attempt && msg.delivery_max_attempts) {
                     title += ` (${msg.delivery_attempt}/${msg.delivery_max_attempts})`;
                 }
-                const route = formatDmRoute(msg.delivery_path, msg.path_hash_size);
+                const route = formatDmRoute(msg.delivery_path, msg.delivery_path_hash_size || msg.path_hash_size);
                 if (route) title += `, Route: ${route}`;
                 else if (msg.delivery_route) title += `, ${msg.delivery_route.replace('PATH_', '')}`;
                 if (msg.delivery_snr !== null && msg.delivery_snr !== undefined) {
@@ -1274,7 +1274,7 @@ function displayMessages(messages) {
             }
             // Show route only for delivered messages (not failed)
             if (msg.status === 'delivered') {
-                const routeHtml = buildDmRouteHtml(msg.delivery_path, msg.path_hash_size);
+                const routeHtml = buildDmRouteHtml(msg.delivery_path, msg.delivery_path_hash_size || msg.path_hash_size);
                 if (routeHtml) {
                     parts.push(routeHtml);
                 } else if (msg.delivery_route) {