size on a sole USA 9 EUR 40 pre-owned ,good condition the sole is 10 inches Very comfy to wear 100% Polyester Thermoplastic Elastomers sole Dearfoams slippers are designed with a multi-density cushioned insole with memory foam, bringing you instant comfort and relaxation. A subtle embroidered design at the toe adds a touch of sophistication. INDOOR/OUTDOOR: With a rubber sole, our velour slippers can be worn indoors while lounging around the house or outdoors to grab the mail or walk the dog.