Ballet flats with glitter details. Buckle fastening on the instep. Flexible insole. Rubber sole. - This product is unique, and the glitter details may vary slightly from the image shown. Each piece is one of a kind, which can lead to small differences in its appearance. SIZE 40: shoes available in size 40. STARFIT® TECHNICAL INSOLE FOAM: Flexible technical insole made of polyurethane foam. Comfort, cushioning and durability.