I normally wear an XL, went for the XXL on the Andes V3 jacket and it fits great. Unbeatable rain and cold protection! A little warm for summer riding, even with the insulated liner removed, but not unbearable. I've paired this with a size 4XL Andes V3 Drystar pants, and they're both excellent for 4-season riding here in Tennessee. I've been riding in this suit down to 25 degrees Fahrenheit and the cold never seeped in, even after a couple of hours. I've also been caught in a few storms and the Drystar membrane on both the Andes V3 pants and jacket kept me 100% dry. If you're looking for inclement weather protection, this suit will do the trick. Some points to note: there's no spine protector included, although there is a Velcro pocket inside to allow the addition of one, which is what I have done. Also, the rest of the armor in the arms and shoulders is built in, so don't buy if you're wanting to upgrade the armor as it won't be possible.