Adjustable | 1 Inch, adjustable from 16 Inch - 22 Inch. Leave only 2 fingers between collar and neck. Please see our sizing chart in the photos. Materials | High density nylon webbing for strength, welded metal D-Rings for attaching tags and leashes, metal quick release buckle for convenience with curved edges for your dog's comfort. Made in the USA | Our collars are handcrafted and sewn in the United States. Offering 30+ color options and numerous sizes to ensure we have what your pup needs. Not for tie out. Options | We also offer matching leashes and harnesses (sold separately). All photo samples are taken of size Large. Please note some computer screens have a slight different coloring. Worn Like a Hug | The silky soft nylon will feel like a hug, all while giving you the assurance of strength and durability. Country Brook Petz' Premium Nylon Dog Collars are a beautiful, comfortable collar made right here in the U.S.A. Custom made using strong, aluminum side release buckles that feature a brilliant mirror finish. In addition, these collars are made from rugged, durable nylon webbing. A heavy-duty, yet soft, flexible material with an attractive appearance, nylon collars are sleek to the touch collar and boast a little bit of a sheen. Our nylon collars are available in a wide array of popular colors that range from basic hues to vivid neon. These collars have an aluminum side-release buckle for an elegant style. Their beautiful silver hued finish offers a touch of class to your pet's attire and the wide-mouthed triglides allow for an easy, no hassle adjustment. Attach dog tags with your information to the heavy-welded D-rings for your pup's security.