I'm a solid 34 waist, which their sizing guide indicates is a medium. Against my better judgement, I ordered a medium (since I normally wear a large), and found them to be too small. Sizing notwithstanding, these are ok boxer briefs, but not fantastic. They're certainly better than the Hanes/Fruit of the Looms of the world. I'm a huge fan of MeUndies, but they are pretty expensive. After reading way too many online reviews, I also bought some of the Supima Cotton ones from Uniqlo. While the fabric and price on those is awesome, the cut is terrible. No 3d pouch to speak of. The cut of these is significantly better than those Uniqlo ones - I'd say it's as good as MeUndies. So why the 3-stars? I'm not a huge fan of the fabric. It feels quite nice against the skin but doesn't seem to be very breathable. Maybe a bit too thick too? There's also a strangely unnecessary and thick seam on the outside of each leg, running vertically. I've never seen underwear have this. Also, they ride up more than I've experienced with others. Not sure why, they just do.