Size...M Uniqlo Heattech Alexander Rib Crew Neck M x 2 Black These are thin and warm Heattech items, perfect for layering without bulk. I opened them to check the items after purchasing them here, and they have been stored at home. I believe this item is discontinued and no longer sold. Would you like to try them? Please understand that there may be some folding wrinkles. Thank you. m(_ _)m