My slender son purchased this, tried it on, but it was too big, so I'm selling it. Other brands fit him perfectly in size S, but Jordan seems to run closer to M. Both the sleeves and the wrists were too large. It looks cool. Jordan (JORDAN) (Men's) Dri-FIT Arm Sleeves Basketball JD3003-010 Quick-drying Baseball Sports Running Brand new, unopened, authentic ●Material: 83% Polyester / 17% Polyurethane ●Manufacturer Color Code: 010 ●Size (S-M) ●Dri-FIT ●Abrasion-resistant, provides a secure fit and supports the arm. The quick-drying material keeps you feeling dry and comfortable. Uses breathable stretch mesh. Flat seams for a smooth feel. Set of 2.