Punchline Pet ADHD Attention Deficit Hyperactive DOG Collar, Soft Nylon Adjustable Dog Collar with Plastic Buckle Extra-small dog collar measures: 3/8 x 8 x 10 Small dog collar measures: 3/4 x 10 x 14 Medium dog collar measures: 1 x 14 x 20 Large dog collar measures: 1-1/4 x 17 x 25 Our Punchline Pet ADHD Dog Collar makes a funny statement gift for any pet lover