Rocky Men's Rkk0159 Construction Boot 100% Leather and Textile Imported Rubber sole Shaft measures approximately 5.25" from arch Platform measures approximately 0.75 inches inches inches Boot opening measures approximately 11" around ASTM F2413 Protective Toe Classification ASTM F2413 Electrical Hazard Standard ASTM F2413 Metatarsal Guard Standards Oiled Full-Grain Leather Guaranteed Rocky Waterproof Construction