The size is listed as M, so I think it's about 23.5cm. These sandals will be useful for the coming season. The gold line makes them look high-end. The mid-heel makes them comfortable to wear for long periods of time. The material is velvet. The color is a calm tone that goes well with any pants and makes your legs look longer! As the photos show, there are some areas with signs of wear and some minor stains. Please understand that these are used items. Color: Black系 (Black-based) Stains/tears/smells: Yes