The first time I saw the large Sabrina in an FP store, I picked it up and thought it looked like a duffel bag to me. Keep in mind - it was completely stuffed with tissue paper.
IMO the large is quite bulky. Depending upon how much you carry, you may be surprised by the small. It does hold a lot!
I'm 5'4" and I think the small is WAY too small for my things... I like the look of the large better IMHO
Charlie, I would love to see your modeling pictures! Where are they? Thanks!