FitFlop Women's Crush Suede 100% Suede Imported Synthetic sole Shaft measures approximately 8" from arch Platform measures approximately 1 inches Boot opening measures approximately 13" around Aegis treated microfiber lining WHY PUTTING ON A PAIR OF OUR SHOES MIGHT BE THE START OF A SLIPPERY SLOPE: We?re warning you ? once you?ve put our magic triple-density MicrowobbleboardTM midsoles under your feet, ?stopping? might be impossible. They?re ergonomically optimised and biomechanically engineered, super-cushioned, pressure diffusing and more than a bit addictive. Look for the red emblem in the outsole. And WEAR THE SHOES. RULE THE WORLD?.