Elastic arm sleeves: wrist circumference is approx. 16 to 28 cm/ 6 to 11 inches, upper circumference is approx. 22 to 34 cm/ 8.7 to 13.4 inches, the length is 37 to 50 cm/ 14.6 to 19.7 inches, works for a lot of peopleFunction: these arm sun protection sleeves can save your arms from UV radiation and arms from muscle strains, especially designed for summerCool and breathable: these unisex arm sun protection sleeves are made of quality material, which is cool and breathable to touch and very absorbent, which are necessary supplies for your lifeWide usages: these arm sun protection sleeves can be applied in many occasions like training, racing, cycling, fishing, driving, golfing, jogging, climbing or any other outdoor activitiesPackage includes: we provide you different quantity of cooling sleeves to choose, various colors choices for you to choose, enough for daily usages, you can share with your friends and family as well