Strap has snaps in case you like to switch to other buckle option
Size 30: Length from Start of strap to middle hole 30" then add 6.5" more to tip end
Size 32: Length from Start of strap to middle hole 32", then add 6.5" more to tip end
Size 34: Length from Start of strap to middle hole 34", then add 6.5" more to tip end
Size 36: Length from Start of strap to middle hole 36", then add 6.5" more to tip end
Size 38: Length from Start of strap to middle hole 38", then add 6.5" more to tip end.