I think as debating between a large and a medium just because i have gained a lot of weight in the last couple of months. I decided to go with the medium and it fit perfect! I am 53, 160pounds. This jacket is amazing! It is now my favorite  It is does no irritate my skin like other jean jackets, this one had a soft material that is perfect to feel cool yet warm. It does not make me feel trapped like other jean jackets. Some of them are always too tight on me where i cant stretch my arm because itll feel uncomfortable. With this one i can easily move without feeling like that and I love that it has an inside pocket! I can easily hide my phOne at work now  it also looks super good with dresses or anything else really. Im thinking of buying the other color now