Rubber & Synthetic. Heel measures approximately 0.75 inches"Premium Western Rhinestone Sun Floral Concho BlingBling Flip Flops in 4 Sizes S056. Sole Material: Rubber & Synthetic.Size chart : small (size 6) , Medium ( size 7, 8), Large ( size 9,10), X-Large ( size 11).3/4" thick (at the heel) & thin soles that are around 1/2" (at the toe)Round open-toe thong sandals, cushiony Wedge Sole