The Klip-on Action Collar is an all fabric training collar. It is the same as a half check collar but the chain is replaced with nylon webbing and is therefore kinder than a half check or choker. It has two unique attachment points. The collar comes with full instructions. Only currently available in Large Small - 1.6cm x 35 -50cm (5/8" x 14"-20") Medium - 1.9cm x 40 - 55cm (3/4" x 16" - 22") Large - 2.5cm x 50 - 65cm (1" x 20" - 26")