White Tetel Perfo ballerina flats by Pom d’Api. The ballerina flats have a leather upper. – Strap with a velcro closure over the foot.– Leather insole.– Non-slip sole.– Upper: Leather.– Lining: Leather.– Sole: Other Materials.– Please note that when you purchase shoes for your child, you should select a size that is 1.5 cm larger than your child’s foot. Wellies and boots should be up to 2 cm larger, for extra socks and insoles.Size Guide (Foot Length): 28 = 175 mm29 = 182 mm30 = 189 mm31 = 196 mm32 = 203 mm33 = 210 mm34 = 217 mm35 = 224 mm36 = 231 mm37 = 238 mm38 = 245 mm39 = 255 mm40 = 259 mm