Fits gently on slender legs. These socks are for sizes 18-20cm. *Sizes 15-17cm are available on a separate page. *The daughter in the photo is wearing the 15-17cm size. Sock Size Guide: • Length (heel to opening): Approximately 19cm • Ankle circumference: Approximately 11cm • Calf circumference: Approximately 13cm *The size may vary slightly depending on the child's build and foot shape. ✔ Doesn't slip off easily ✔ Warm ✔ Smooth to the touch Color: Navy (only one color) Contents: 1 pair (limited quantity, brand new) Made for my daughter who has trouble with socks that are too loose and slip off... I hope this helps children and families who have similar difficulties choosing socks. *We want to continue to improve, so we are offering this at a special price this time. Shipping: We are selling these while raising a child with disabilities, so we will ship as quickly as possible, but it may take some time.