Product name: Children's sunscreen sleeve + silicone non-slip leg cover Material: 92% polyester, 8% spandex Sizes: S (4-7 years),M (8-10 years),L (11-14 years) Leg cover size: Length 37cm, upper leg circumference: 14cm, lower leg circumference: 9cm(equal size) Sleeve size Chart: Size--------Length---------------Biceps Circumference----Lower Am Circumference S(4-7 Years)------------30cm/11.81"---------16cm/6.30"--------------------12cm/4.72" M(8-10 Years)-----------33cm/12.99"---------19cm/7.48"--------------------14cm/5.51" L(11-14 Years)------------36cm/14.17"---------22cm/8.66"--------------------16cm/6.30" Note: Due to the tile manual measurement size, the error of 1-3cm is within the normal range. Package Included: 1 pair of arm sleeves and 1 pair of leg sleeves Kids Arm Sleeves and Basketball Leg Sleeves Set, made of sun protection fabric, Very lightweight, breathable,stretchy. Cooling Am Sleeves are long enough to cover most of your am, which will protect your am from the sun. Am Sleeves have good sweat wicking ability with non-slip pads that stick to your skin and prevent slipping. Suitable for a wide range of indoor outdoor sports, including mountain climbing, biking, walking,other balls activities. S-L/4-14 Years. Our Cooling Am Sleeves and leg sleeves have 3 size,suitable for children of different ages.