Personally I would get the MM, the GM seemed too big on me when I tried it on! For reference there is a picture of Heidi Montag (barf) carrying the Neverfull GM on the celebrities and their LV thread, it's the 7th post on the first page! This isn't the only pic of her posted carrying this bag though and in a lot of the other ones it looks like a shield that she is hiding behind...way too big on her IMO. BUT as someone said, if you cinch the sides of the GM it really shrinks the sides and grants you the opportunity to open it up when you have a super lot to carry!