These are lightweight, quick-drying waraji-style sandals made by wrapping a nylon core with yukata fabric. Although made from recycled fabric, they are new as sandals. The recommended size is 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. Please wash separately as there is a risk of color bleeding. If the thong feels too tight or loose while wearing, try untying and retying the thong on the underside. Please understand that these are handmade and not perfect. Please refrain from purchasing if you have a dog allergy.