Both sizes are 11.5cm. Because they are made of stretchy material, they fit easily regardless of the shape of the foot, providing a sense of stability and making them very easy to put on. The soles are also relatively sturdy and resistant to wear. I think they are still in good condition and can be used, so I would like to sell both pairs together at a reduced price to someone who needs them. Please note that these are used items, so individual perceptions of condition may vary, and there may be oversights. Please refrain from purchasing if you are looking for perfection or are concerned about minor details. Striped design sock-style first shoes with rubber soles for non-slip grip. - Color: Stripe (Black/White) + Red/Yellow - Sole Material: Rubber - Design: Sock style - Size: Unknown (cannot be confirmed from the image) Thank you for viewing.