Kirkland Signature 12 Pack Men's Crew Neck T-Shirts 100% Cotton Tagless 100% Cotton Tagless comfort Reinforced seams 100% combed heavyweight cotton 12-pack Chest Circumference (in): M = 38-40 | L = 42-44 | XL = 46-48 | XXL = 50-52 | 3XL = 54-56 | 4XL = 58-60