Hamilton Spumoni Collection 1-Inch Wide Adjustable Dog Collar 100 percent premium custom dyed dual tone nylon with fashionable ribbon overlay Unique O-ring placement for maximum strength and durability Custom buckle insert enhances the look All cuts are finished away from the neck to avoid irritation Adjustable collar, lead and easy-on step in harness available in 5/8 inch and 1 inch widths When measuring pet's neck or chest to ensure proper and comfortable fit, add 2 inches.