Bees Knees Tees Black Mesa Research Facility T-Shirt in 13 Colours 100% Cotton 100% Premium Cotton (Other than grey which is 10% Polyester) Long lasting T-Shirt, with outstanding print quality - stand out from the crowd. Chest sizes: Small = 34-36", Medium =38-40", Large = 42-44", XL = 46-48", XXL = 50-52", XXXL = 54-56" Exact size, armpit to armpit: Small - 46cm, Medium - 51cm, Large - 56cm, XL - 61cm, XXL - 66cm, XXXL - 71cm Exact length, collar to hem: Small - 71cm, Medium - 74cm, Large - 76cm, XL - 79cm, XXL - 81cm, XXXL - 84cm