These are in excellent condition, having only been worn around the neighborhood for a test run. Size is XL (27.5-28cm). I purchased these about a year ago at an Alpen Outdoors store. ↓ The following is quoted from the official website: The classic TELIC model, which embodies simplicity and basic design, has evolved. TELIC's iconic model has been updated with the softest new material, "ULTRASOFT." The increased thickness not only relaxes muscles more effectively, but also features a larger, thinner T-mark on the surface that touches the foot, resulting in a smoother feel. The simple thong design is suitable for a wide range of situations, from everyday casual wear to relaxation after sports. The sole surface uses SILKY SOLE, providing a smooth feel against the soles of the feet. Material: EVA Sole Thickness: 3.5cm Sole Surface Specification: SILKY SOLE Color: Black