Fits gently on slender legs. Socks are 15-17cm. *18-20cm sizes are listed on a separate page. *The daughter in the photo is wearing the 15-17cm size. Sock Size Guide: • Length (heel to opening): Approximately 17cm • Ankle circumference: Approximately 11cm • Calf circumference: Approximately 13cm *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, new and unused) My daughter's socks would always be too loose and slip off... I made these for her, and I hope they can help other children and families who have the same problem with choosing socks. *I want to continue to improve these, so I'm offering them at a special price this time. Shipping: I am selling these while raising a child with disabilities, so I will ship as quickly as possible, but it may take some time.