22cm 22 centimeters The size is 22cm, but the sizes of the left and right feet are slightly different. The right foot feels like it's about 23cm. I didn't notice this until I listed the item. Please check the photos. If you tighten the laces firmly, they shouldn't slip off, but please refrain from purchasing if you are concerned! Please refrain from purchasing if you are nervous about used items. ⚠️ I will ship in simple packaging, just waterproofed with plastic.