Ancol Heritage Nylon & Chain Check Collar - Black. This dual style collar has been designed to help control and teach your dog if they have a tendency to pull. Made from a strong Nylon material and mild steel links that have been welded together for additional strength, the collar can be adjusted to ensure a comfortable fit around your dogs neck. Please note: This collar should only be worn with a lead and under constant supervision. Size Guide:       Size 1 - 10"-14" (25-35cm)       Size 2 - 14"-18" (35-45cm)       Size 3 - 18"-24" (45-60cm)       Size 4 - 20"-28" (50-70cm)       Size 5 - 22"-30" (55-75cm) Price varies with size.