An absolute CUSTOMER FAVORITE. We can't seem to keep these in stock. They are amazing undershirts that pair SO well with all pieces. They are a "One-Size fits most" We recommend XS/XL. They fit snug because they are made out of Nylon and Spandex. (Which is a nice bonus cause it sucks in a pound or two...) Comes in Regular length or Long Torso length. Longs are far more popular, but both are a must have for any wardrobe. New colors arrive constantly and sell out quick. You DON'T wanna wait on these babies!