22cm, kids. These are pink and black checkered Columbia boots that are both waterproof and warm. The insoles are removable, and they offer excellent warmth. They can be securely fastened with the ankle band. Used 3 or 4 times. There are some white stains (see photos), but there are no issues with the fabric and no problems with use. The name on the inside of the insole has been erased with a marker (see photo). I will ship them in a small, simple package. Thank you for looking. Size...17cm or more