Havaianas Women's Retro Sandal 100% Rubber Rubber sole Heel measures approximately 3/4" Platform measures approximately 1/2 Brazil size 35/36 fits US Women's size 5/6, Brazil size 37/38 fits US Women's size 7/8, Brazil size 39/40 fits US Women's 9/10, Brazil size 41/42 fits US Women's 11/12. US size stamp on shoe is based on Men's shoe size