John wrote:

That did the trick.

I defined a new view definition called
"My Attachment Size" using your suggestion.

Is there a way to apply "My Attachment Size"
View | Arrange By | Current View | My Attachment Size
to every subfolder of the Inbox so when I select a subfolder
"My Attachment Size" is the default view?
It looks like one must manually set the view to "My Attachment Size"
for each subfolder.

You could modify the default Messages view and then every folder using that
view would exhibit the change.
--
Brian Tillman