Medium: 1 inch webbing - adjusts from 15" to 18" with 1.5" O-Ring
Large: 1 inch webbing - adjusts from 17" to 20" with 1.5" O-Ring
Extra Large: 1 inch webbing - adjusts from 19" to 22" with 1.5" O-Ring
Extra (2x) Large: 1 inch webbing - adjusts from 21" to 24" with 1.5" O-Ring
Extra (3x) Large: 1 inch webbing - adjusts from 23" to 26" with 1.5" O-Ring
Extra (4x) Large: 1 inch webbing - adjusts from 25" to 28" with 1.5" O-Ring