Mountain Rope Choke Collar 20 Inch - Hawaiian Blue - Medium Dog 20 Inch Double Braided Nylon Rope Collar Aluminum Ferrules and Strong Construction - lightweight Buy collar that is 1-2 inches larger than dog's neck size To view other colors & sizes - Click above on Other Products by National Leash. Colors will not bleed - Rope 8 mm thick - Helps block heat buildup under collar.