The premium range featuring a comfortable handle has been expanded to include a collar made entirely of webbing. This is the most powerful in terms of the retractable collar available, and it comes in an open package that allows consumers to experience the product "hands-on" before purchasing. Measurement Guide Size 1 - Small for dogs weighing up to 20 kg Size 2 - Medium for dogs weighing up to 25 kg Size 3 - Large for dogs weighing up to 65 kg