FitFlop Women's Mukluk Boot 100% Leather Rubber sole Shaft measures approximately 7" from arch Heel measures approximately 1.75" Platform measures approximately 1.25" Boot opening measures approximately 11.5" around Aegis treated microfiber sock Hard wearing suede mudguard Reinforced stitching Our patent-pending, original MICROWOBBLEBOARD(TM) midsole technology fuses three diagonal sections of triple-density EVA into a single, seamless, underfoot platform to absorb shock, diffuse high-pressure spots, and make your feet feel amazing!