diff --git a/flash/configuration/storage.mdx b/flash/configuration/storage.mdx
index 77379534..1593afc0 100644
--- a/flash/configuration/storage.mdx
+++ b/flash/configuration/storage.mdx
@@ -65,6 +65,8 @@ async def process(data: dict) -> dict:
     ...
 ```
 
+The `size` parameter specifies the volume size in GB. Valid values range from 10 to 4096 GB (4 TB). If not specified, `size` defaults to 100 GB.
+
 You can also reference an existing volume by ID:
 
 ```python