KUBUA water shoes for kids, size 31 EU/13 US

Purchased on Amazon for my son. He used it on vacation last summer, two weeks usage only. They were perfect for the beach and to use in the water. Was hoping they'd fit him this year, but his foot grew. Details and information are taken from Amazon's website. Near perfect condition, just need to clean off the rocks. -Imported -Rubber sole -Platform measures approximately .50" - Comfortable feeling: Fabrics uppers are breathable and have stretch, give feet flexible and comfortable feelings, smooth designed neck could reduce chasing when kids wearing our water shoes. -Lightweight and convenience: Quick dry water shoes, ultra light weight smooth stretchy fabrics and easy slip on design. lightweight and compressible to fold and carry. - Rubber outsole& foot safety: wearable and top quality sole, slip resistant sole for great protection to kids little feet, quick drying and comfortable to wear. size 13, color is black refer to pictures for more information and details. only wear and tear is from having been worn, and just some rocks and stuff that needs to be cleaned off.