Gently fits slender feet. These socks are for sizes 15-17cm. *Sizes 18-20cm 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 17cm • Ankle circumference: Approximately 11cm • Calf circumference: Approximately 13cm *The fit may vary slightly depending on the child's build and foot shape. ✔ Doesn't slip off easily ✔ Warm ✔ Smooth to the touch Color: Navy (one color only) Contents: 1 pair (limited quantity, new and unused) Made for my daughter who has trouble with socks that are too loose and slip off... I hope these socks will be helpful for children and families who have similar difficulties in choosing socks. *I want to continue to improve these socks, so I am offering them at a special price this time. Shipping: I am selling these while raising a child with disabilities. I will ship as quickly as possible, but please allow for some time.