Well I'm a short plus-sized girl and mine fits me just fine... I have both the medium and the large and I like both for different reasons. My medium holds my daily stuff just fine, and I think the best thing about the large is the slouchiness (which doesn't make it seem so big).
I bought the medium Carly (twice)...bought the chocolate one first and like a previous poster said, I was also concerned about the length of the shoulder strap w/ a heavy coat. So I got rid of it I REALLY liked the Carly though and the large was WAY too big for me....so I decided (w/ the help of another tPF member..you know who you are!!!!! LOL) to try again w/ the khaki/saddle medium carly b/c I could use that at different times of the year since it isnt such a dark color,
I'm short and plus sized but my weight is apparently not in my shoulders because I don't have the body to back up that large Carly. When I was taking it back I put it on for my friend and she was like, "no handbag should hit mid-thigh. Although, you could put a brick in the bottom and use if for the occasional beat down."
I didn't know how to respond to that so I just took it back.