Two-tone necklace design:
This means the back is 1" and the biothane part of the attachment is 3/4".
BioThane® is a strong, durable material that does not stretch, is water-resistant and does not absorb bad odors.
Hardware:
Brass, nickel, or black-plated hardware. Unfortunately, the black-plated hardware tends to flake off over time.
Size:
When ordering, please specify your dog's adjusted neck size. This measurement corresponds to the middle adjustment hole from the end of the buckle. The collar has 5 adjustment holes for a total of 5 inches.
Minimum neck size for this product: 13 inches 
Identification plate:
An optional identification tag is available and is attached using double-headed rivets to ensure optimal identification of your pet. The tag is designed to match the collar hardware. The tags are 50mm wide and 13mm high. They are made of brass (gold), stainless steel (silver), or aluminum (black).