S: rope length 1.1m, bandwidth 1.5cm, chest (28-35) cm, neck about 24cm; reference weight 2-4 kg

M: rope length 1.1m, bandwidth 1.5cm, chest (38-46) cm, neck about 30cm; reference weight 4-10 pounds

L: rope length 1.1m, bandwidth 1.5cm, chest circumference (45-56) cm, neck about 34cm; reference weight 10-15 pounds