In most places, your skin is about 2mm (0.07in) thick. On your eyelids, though, it is just 0.5mm (0.02in) thick. The thickest skin is on the soles of your feet, where it gets the most wear and tear. Here it is 6mm (0.2in) thick. The average thickness of a rhino's skin is 6cm (2.4in), ten times thicker than yours.