These are lightweight, quick-drying waraji-style sandals made by wrapping a nylon core with yukata fabric and then braiding it. The yukata fabric is recycled, but the sandals themselves are new. Size: L, approximately 24-24.5cm. To wash, hand wash and put in a net for spin-drying, or use a washing machine with a net on the delicate cycle. If the thong loosens or feels tight after wearing for a while, try retying the thong on the underside. These are handmade, so they are not perfect. Please understand this before purchasing. Please refrain from purchasing if you have a dog allergy.