This coat is so fabulous! I lusted after it for months and finally pulled the trigger this past Christmas. I initially ordered a small and it was too tight in my shoulders. I'm 5' 5" and weigh 135. The medium fits just a little bit bigger, nothing drastic but I could layer a sweater underneath, whereas the small was like a glove. The leather on this jacket is nice and thick and when it's cold out you can slip your hands inside the pockets, which a surprising amount of leather jackets have. Some people commented about the arms being made of another material besides the leather but i like this feature, it makes the arms a bit more comfortable. I think I will easily wear this jacket for years and years. A good investment!