Size: This Herm Sprenger dog collar has round links and is made of matt stainless steel and is designed for dogs with the neck circumference of not more than 17 inches (43 cm). Overall collar length is 20 inches (50 cm) with 3mm wire gauge. Important: It is especially important to choose a correct size. Consider your dog's head size as well when selecting size of the collar - collar slips over the dog's head and ears and is not adjustable. Functionality: Round chain links effortlessly run through the O-rings creating a loop and easily slip over the dog's head and ears. Depending on the connection with the leash the slip chain acts as a training choke collar, behavior correction collar, or an ordinary neck collar suitable for everyday activities, or as decorative accessory. Design: Unique matt finish choke style chain for dogs has round links and is well suitable for short fur. The chain is scratch resistant and rust resistant. Welded links offer strength and durability. Professional Quality: Made in Germany with precise German engineering, reliability, and quality by the world's foremost manufacturer of top-quality training collars. 2 O-rings are stamped with the Sprenger seal of quality HS-Germany.