Size:6.7x3.1 inches (17x8cm)--Usually fits kids/children/boys/girls/school child from 5-13years old. The palm is non-slip and the the back is breathable and elastic. With convenient adjustable strap,children can adjust freely. Suitable for all seasons and can be daily use or used for running,cycling,skating,hiking,biking and other outdoor or indoor sport. Handwash is recommended.