Step & Stride Galacia Boot 100% Man Made Synthetic sole Shaft measures approximately 4.75" from arch Heel measures approximately 0.75" Platform measures approximately 0.5 inches Boot opening measures approximately 8.25" around Magic Adjust removable insoles to accommodate medium or wide feet Magic Flex notched outsoles allow shoes to bend and flex with the foots natural movement Magic Cushioning outsole provides cushy comfort and support Magic Wick insoles with odor fighting OrthoLite technology to keep feet feeling fresh Easy to fasten strap with adjustable buckle system for a snug secure fit for any width