Coastal Pet 3/8" No Slip Collar Adjustable 6-10 inch Blue Excellent for dogs which easily slip a collar (i.e. Greyhounds, Dachshunds, etc.). The unique Limited closure prevents the choke from becoming too tight. 3/8 inches wide in black. This adjustable Choke/Collar is made from high quality nylon and is thick and strong. All nylon products are carefully and neatly finished for the best look and durability. Adjusts from 6 to 10 inches. Measure your pet's neck and add two inches that should fit your pet .