I purchased a size down from my regular size thinking the hoodie would be slightly big and loose because of how short I am, but it's actually more slim fit and tapered around the body than I predicted. I suggest just purchasing your regular size as mine was slightly a bit tight around the chest, but the length of the jacket and sleeve length were perfect and not at all uncomfortable. The jacket does shrink a little bit as mine had, but it wasn't much of a problem especially after constant use. The hoodie is also good for layering under thicker jackets, and it maintains a stylish look that seems proportionate to the whole body where it's not too big but not skin tight. Quality is good and the pricing is decent; I suggest buying one just to try out as It's one of the few hoodies on the market with multifunctional capabilities.