For exciting sex games, 'place the soft lined collar around the neck and tie the hands behind the back with the wrist straps. The result is devoted helplessness. This bondage set is fully adjustable so can cater for most size men and women. NB. The back strap is adjustable up to 18.5 inches, the collar is adjustable up to a circumference of 16 inches and the cuffs are adjustable up to a circumference of 11 inches.