Rocky Men's RKYS060 Rain Boot 100% Synthetic Imported Rubber sole Shaft measures approximately 15" from arch Platform measures approximately 1.0 inches Boot opening measures approximately 15.5" around 1,600 Grams 3M Thinsulate Ultra Insulation 16 Inches In Height Guaranteed Rocky Waterproof Construction Aggressive Multi-Directional Rubber Outsole Shaft Height and Circumference May Vary By Size