I tried both the Galliera MM and GM at the boutique recently, and both are huge! Gorgeous bags though, but I do wish they had the same striped lining as the Neverfull line.

The MM was the 'perfect' fit size, but honestly I preferred the GM - it's outlandishly huge, but stunning and slouches nicely underarm! My SA and I compared it directly with the Neverfull GM and they're pretty much the same size, though to me the better looking bag with that vachetta piping breaking up the monogram expanse.