FRYE Women's Shirley Over-The-Knee Engineer Boot 100% Leather Imported Leather and Rubber sole Shaft measures approximately 22.5" from arch Heel measures approximately 1.25" Boot opening measures approximately 17" around Leather over-the-knee boot featuring back shaft with scalloped topline and decorative strap Instep zipper , Show off the tab with artisanal stitching in the back, or fold over for an entirely new look