I followed the reviews and purchased a large, and I'm glad I did (5'4" 135lbs). The arms are definitely tight compared to the body of the coat, and I don't normally have problems with shirts or jackets fitting my arms. Otherwise, this is a lovely soft & cuddly warm coat. The hood is very loose, which lends it an elegant look, but you'll need to wrap your face and ears with a scarf for head warmth.. The pockets are a bit shallow and gloves have to be folded in half to fit inside. The left pocket has a zipper on the back inside the coat which can hold a small cell phone or small keychain.