Navy and light blue sandals with good ventilation, lightweight and perfect for water play. - Color: Navy and light blue - Design: Sandals with ventilation holes - Style: With back strap - Material: Lightweight plastic - Usage: Perfect for water play and everyday use The size "23" is written on the zori (sandals), but my child wore them when their foot was 12-13cm. They used to light up when walking, but now only the left one lights up. The soles are not worn down, so I think they won't be slippery. I washed them clean before listing them. Please understand that these are pre-owned items before purchasing. I am also selling other pre-owned zori, so bulk purchases are welcome. I will offer a discount for bulk purchases. #KidsZori #KidsSandals #KidsShoes #PlarailSandals #PlarailZori