I’m 5’4” 120lbs pear shape 34B/32C bra. Fitted shirt: XS and normal shirt: S. I ordered size XS because I am petite in the shoulders and I wanted the jacket to be really fitted. It fits perfectly. I was really worried it would be too small but I can bend over with it zipped without a problem. I could’ve easily done size small if I wanted to wear a fleece under it. I am very happy with the way XS fits because I wanted a very fitted clean look. If I needed to wear a really bulky hoodie under it I would’ve sized up to medium. I just intend to wear a normal long sleeve knit top under the jacket so it works perfectly for me in XS. If you have broad shoulders or a big bust go with your larger size. The quality is wonderful. It’s super soft and thick weight. The zipper runs great. It looks way more expensive.