Grow With Your Kids. Adjustable length with the maximum length about 7.8 Inches and the minimum length about 5.9 Inches. Fit for kids' shoes' size from US Toddler Size 4 to US Little Kid Size 12 (About age 2-6). Unique Wheels Lock Mode. Patented WHEELS LOCK mode to lock the front wheels, designed uniquely for beginners, easy to get the hang of skating. Safe and Durable. Quality materials make it comfortable to wear and cute appearance design adored by both boys and girls. Easy and Fun. Easy to slip into the roller skates without taking your own shoes off. Easy for kids to put them on without any assistance. Years of Test and Approval. Selling tens of thousands pairs a year, loved by kids all over the world, has stood the test of time. Best choice for the first pair of skates for kids.