FitFlop Women's Dueboot Biker Winter Boot 100% Leather Imported Rubber sole Shaft measures approximately 9.75" from arch Heel measures approximately 1.5" Platform measures approximately 0.5 inches Boot opening measures approximately 13" around Fitflop ff2 footwear is built with ergonomically engineered supercomff midsoles offering an increase in foot-to-midsole contact for advanced underfoot pressure diffusion, cushioning and comfort. Leather upper/synthetic lining and sole. 1 3/4" heel; 1/2" platform 8 3/4" boot shaft.