Casual Canine Rad Plaid Dog Collar, 10 to 16-Inch, Charcoal Our Casual Canine Rad Plaid Dog Collars evoke a clever combination of plaid and polka dots giving them a "rad" style that pet owners will love To determine the proper size, measure the circumference of pet's neck and add 2" Material: 100% Polyester, Reflective Fabric, 100% Polyester Ribbon