Gray Havaianas Slim flip flops flip-flop by Havaianas. The sandal is made in Brazil and has a rubber sole. It has a brand print on the strap and soft straps. – Upper: Rubber.– Lining: Other Materials.– 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): 25/26 = 154 – 166 mm 27/28 = 167 – 179 mm 29/30 = 180 – 193 mm 31/32 = 194 – 206 mm 33/34 = 207 – 219 mm 35/36 = 220 – 233 mm