The one everything else is measured against. Knitted on loopback machines that run at a third of normal speed, then washed twice before it is cut, so the sweatshirt you get is the size it will stay.

Sizes: S, M, L, XL, XXL. Type one of those at checkout in the Size field. Pieces are washed twice before they are cut, so the size you buy is the size they stay. Free shipping. Unworn returns within 30 days.