about that product: 1. Creative and comfortable foot massage halter sandals. 2. This is the pair of quick put on and take off slippers you have been looking for! 3. Convertible upper with open design. 4. Comfortable and breathable, no feet rubbing. 5. Concave-convex shading design, balance friction. 6. The inner side is designed to massage the sensation of the feet and disperse the pressure on the soles of the feet. Specification: Name: No upper slippers Material: EVA Color: gray/black green/red/yellow/blue Package content: 1 * Convertible slippers without upper design Product size: (length x width x height) 35-36: 25×10×5cm/9.8×3.9×2 inches 37-38: 26×10×5cm/10.2×3.9×2 inches 39-40: 27×10×5cm/10.6×3.9×2 inches 41-42: 28×10×5cm/11×3.9×2 inches 43-44: 29×10×5cm/11.4×3.9×2 inches notes: 1. The Asian size is smaller than the EU/US/UK size. Please check the size information of the last picture in the picture area carefully before placing an order. 2. Due to manual measurement, please allow a difference of 1-3CM. 3. Due to the difference of light and screen, the color of this product may be slightly different from the picture.