Snug Fit design boots: Slip-on boots that feel like they are laced on; superior ankle/heel support to reduce incidences of ankle roll-over; superior arch support to reduce fatigue, finally a gum boot that moves with you, as part of you. Shaft measures approximately 13.75" from arch, Heel measures approximately 1.5", Platform measures approximately 0.75", Boot opening measures approximately 18.25" around. CSA Z195-14/ ASTM F2413-11 Grade 1 Steel toe and plate, CSA Omega - Electric Shock Resistant 18kV, Chainsaw Protection (Mid Class: 24 m/sec chainsaw speed as per EN ISO #17249:2013), EN ISO 20345:2011 SB PE HRO FO SRA