Sold as 1 sleeve (not a pair).......Sizing: For a proper fit, measure the top of bicep with the arm relaxed. Note: All sizes measured in inches. YS 8-9.0 , XS 9-11 , S/M 11-12.5 , LG 12.5-15.5 , XL 14-16 , 2XL 15.5-17 , 3XL 16-19 ........ Perfect Fit Guarantee: Because there are many arm sizes, sometime a sleeve will not fit perfect, even if the bicep measurement is carefully selected. In this case, simply contact B-Driven Sports directly and we will send you a pre-paid label for a free exchange. Thats our guarantee to making sure you are fully satisfied with the product. Specifications..... RE-ENFORCED SILICONE ELASTA BAND, providing anti-slip performance. UPF 35+ protection from the sun. HD print technology providing high definition detail and vibrant colors. Flat-lock seams add comfort and chafe free performance. 220 GSM fabric is 30% stronger than most arm sleeves. Stay-dri fabric provides moisture wicking comfort. l providing order free use. Benefits: A wide range of people use our sleeves for multiple purposes including: UV protection, Increased blood circulating, Injury prevention through muscle support and muscle vibration reduction, Reduced swelling and inflammation, Joint relief, Skin blemish cover-up, Moisture Wicking promotes comfort. Great for sports, athletics, and general-purpose use........ B-Driven Sports: We are a family owned business 3 generations strong, located in Central Minnesota. We pride ourselves in customer service and love communicating with our customers. If you have any issues, questions, or concerns, we are ALWAYS happy to talk with you.