I purchased these as a spare pair. I'm selling them now because my child has outgrown them. The "578," a new running shoe for kids with a lace-up design, is the successor to the popular, high-cost-performance "570" model. The midsole uses Dynasoft, providing comfortable cushioning and resilience. Rubber is strategically placed on the outsole for grip and durability while remaining lightweight. The seamless, bonded upper offers a comfortable fit, making these shoes ideal for everything from school to everyday wear. New Balance PK578RB sneakers in navy blue, size 21.5cm for kids. - Model: PK578RB - Size: 21.5 cm (JPN) / 3.0 (USA) / 2.5 (UK) / 35.0 (EUR) - Color: Navy Blue - Brand: New Balance Thank you for looking.