SIZING: Every leather collar size measured from the middle of 5 holes on non-buckling side, meaning each collar has a 4" variance from the size given. Available in Narrow (3/4 in) or Wide (1 in). MATERIAL: Made of high quality leather. These collars look great on any dog. Leather breaks in over time and may be stiff at first. HAND MADE in USA: Mendota Standard Leather Collars are hand made in the USA using premium durable leather. HARDWARE: These collars are made with non-corrosive solid brass hardware. MENDOTA GUARANTEE: Mendota's gear for dogs is built to last, we guarantee it for the life of your pet.