Fruit of the Loom Men's Classic Thermal Underwear Bottom
I'm 5'8 inch with 32 inch waist. Bought a Medium. Right out of the package they're a little baggy and long. They fit comfortably under my jeans and the waistband fits right. I just have to fold the cuffs up so they won't bunch at the ankle. No material defects. They're comfortable and If they shrink some after washing, I expect they'll fit me even better.
Fruit of the Loom Men's Classic Thermal Underwear Bottom: