The Size Mark On The shoes Is Chinese Size Number. It is recommended that you choose the right size by measuring your foot length. If your feet are fat or wide, it is recommended that you choose a size larger. Sole Material: Rubber Insole Material: EVA Upper Material: Polyester Lining Material: Polyester Manufacture Country: China Style: Fashion Size Foot Length 36-37: 23cm 38-39: 24cm 40-41: 25cm 42-43: 26cm 44-45: 27cm Package included:1*pair of slipper Note: 1.There is 2-3% difference according to manual measurement. 2.Please check the measurement chart carefully before you buy the item. 3.Please note that slight color difference should be acceptable due to the light and screen. Label: Yes Washing: Hand wash Manufacture Country: China