Material: PVC LIGHT-UP FUN KIDS SHOES: These slippers are equipped with LED flashing effect to bring kids walking fun. Made of high quality upgraded light strips that are not easily damaged and do not require charging devices, suitable as gifts for children, boys and girls. High quality EVA eco-friendly material: These shoes for boys and girls are lightweight and comfortable. Designed to fit: these non-slip shoes are easy to take off and put on, while being very durable. Size: size 21 inner length 13.5cm,size 23 inner length 14.5cm,size 25 inner length 15.5cm,size 27 inner length 16.5cm,size 29 inner length 17.5cm,size 31 inner length 18.5cm,size 33 inner length 19.5cm,size 35 inner length 20.5cm Applicable occasions: suitable for outdoor and indoor activities, garden, hotel, beach, party, supermarket shopping, walking with dogs, etc., suitable for children to spend happy summer leisure time.