diff --git a/model/stored-items/chat-size.md b/model/stored-items/chat-size.md
index 2020557..0f5e6c8 100644
--- a/model/stored-items/chat-size.md
+++ b/model/stored-items/chat-size.md
@@ -1,8 +1,9 @@
 ---
 id: 01a108dd-6751-7040-bd3c-4bb5ecf70bc6
 source: Local
-mechanism: session-storage
+mechanism: local-storage
 necessity: optional
+duration: Until the visitor clears it
 surfaces:
   - chat.blust.ch chat
 ---