size L or XL (the tag was annoying & I cut it out) I am 6'1 & wear a 35" or 36" waist in most of my pants, jeans, khakis, so I believe these sweats are a large they do have a drawstring & elastic waist relaxed Fit with a wider leg opening at the bottom excellent used condition no issues, stains, or rips these are pretty lightweight, not super thick, great lounge wear