Lucksender Womens Lace Up Platform Combat Chunky Heel Martin Boots PU Shaft measures approximately 6" from arch All of our Shoes are marked as China Size. Please measure your foot from toe to heel. We have updated the size chart, please refer to our new size chart. TPR Sole Shaft measures approximately 6" from arch,Boot opening measures approximately 10" around Heel measures approximately 3.94";Platform measures approximately 1.5" Manmade Material