JeramyK, Order the size you normally wear. Im 6' 240lbs and ordered an XL the top fits fine with just a sweatshirt or a parker on. The pants seem a little big with no coveralls on but fit ok. the inseam on the pants is a little longer than i like usally i get a 31" inseam but the pants i have to wear up by my bellybutton, but not a big deal. Hope this helps. The only thing i didnt care for was zipper on the legs, i wish it went all the way up to the knee cap.