I’m 5’7” 125lbs. I bought the small sweatpants. They were huge on me even tho my waist is 26in. Not just that, but they were super long and I have pretty long legs. The ones I ordered for my boyfriend were true to size tho. They are super soft tho! Just a heads up for people wanting to order!
EDIT -- I take this back! They shrunk in the wash for me, and fit perfectly now!