I would say it's medium, but it depends on what you are used to carrying. There are quite a few ladies that have them and could post pics for you. It's a beautiful bag and definately not too young for anyone.
I'm a VERY late 30's gal..LOL..(just turned 39 a few weeks ago) I don't see the Leigh as a "young person only" bag at all! In fact, I don't think of any bag as old or young. I think you should wear what you love regardless. I would say the Leigh is a roomy medium bag. Best way I can describe it.
I love the leigh. I hope to someday own it in one of the many beautiful shades it came in. I consider it a medium sized bag, although that's all relative. I don't think it's an exclusively "young" bag at all. In fact, to me it looks almost old-fashioned in some respects. It's structured, polished, and ladylike in my eyes, and the chain handle adds an extra touch of sophistication. I actually haven't seen it on many women under 30.
Thanks for the opinion & pics (great to see it actually on someone's arm). I have went bezerk this month buying handbags. Need to sloooowwwww way down (ugh but buying is so much fun!) Unfortunately my closest Coach store is an hour away so I don't get to see them IRL until my nice little postman delivers them to me