This is a 2-pack undershirt with a soft texture. Sizes: S, M, L, O, XO; Material: 91% polyester, 9% polyurethane; Country of Origin: China; Size: Length: S, 26.4 inches (67 cm), M: 27.6 inches (70 cm), L: 28.7 inches (73 cm), O: 30.9 inches (76 cm), XO: 42.5 inches (79.8 cm), Shoulder Width: Approx. 42.2cm, XO: 17.1 inches (43.4 cm), Sleeve Length: S: 9.3 inches (23.5 cm), M: 9.6 inches (24.5 cm), L: 10.0 inches (25.5 cm), O: 10.4 inches (26.5 cm), XO: 10.8 inches (27.5 cm). Product is standard for mens sizes.