4 Size Adjustable: Designed for growing children, these roller skates feature 4 adjustable sizes to easily accommodate foot growth, eliminating the need to replace shoes frequently. With just the press of a button, you can quickly adjust and find the perfect fit. Colorful Light-Up Wheels: Each wheel is equipped with cool rainbow lights. When skating, its like a meteor streaking across the night sky, with all 8 wheels illuminating for extra fun. No batteries are needed, as the safe self-generating power system automatically lights up while you skate, making it both eco-friendly and safe. Suitable for All Ages: Whether for kids or adults, roller skating is fun for everyone. These skates make the perfect Christmas gift for children, offering endless fun and enjoyment. High-Standard Comfort Design: With a reinforced aluminum frame, PU wheels, and ABEC-7 bearings, these skates provide a smooth, quiet, and confident ride. They are durable, comfortable, and suitable for all types of terrain. Great Value High Performance: Combining excellent performance and unique lighting effects, these skates are a must-have for both fun and practicality. They are an ideal family entertainment choice with great value and will be loved by kids. S: Suitable for 26-33 shoe length: 18.5-21.5cm M: Suitable for 33-37 shoe length: 21.5-24.5cm