Thigh High Stiletto High Heel Boots (Shaft Height At the Thighs) - The Special Arch Boots have a special arch that accentuate the curves of your feet. They are specially made to fit your arch in the high heel position. The THB has inside zippers. Now available in 14cm heels (Sizes 38 to 45), 16cm heels (Sizes 37 to 46), and metallic heels (Sizes 37 to 46). The 16cm regular and metallic heel styles have reduced heel heights for smaller sizes. 18cm and 20cm metallic heel platform shoes have almost the same heel height for all sizes.