For infants age 0-1 month ONLY. Comes in 5 packs of 3 braces and right or left arm. If you purchase 1 unit, you will receive 5, 3 packs of the brace (15 braces total) in your designated arm type. Please remember to specify which arm you would like. Directions and precautions on packaging. Contact us at email@example.com if you have questions or specialty sizing requests.