The size is S, but it fits a 23.5cm foot if the belt is at its maximum, which is how I used it. There are no noticeable stains except on the sides. I've worn them three times. These are open-toe sandals made of beige suede with cork platform heels. - Color: Beige - Material: Suede, Cork - Style: Platform Heel - Design: Open-toe, Back strap Thank you for looking.