Material: Leather and brass. Great quality leather with soft leather padding inside to keep your dog comfortable. Solid Brass fittings ensure this collar is durable and long lasting. Comes with a Brass name plate to engrave your dogs name on. Size guide: XS 21-27cm, S 25-33cm, M 35-44cm, L 41-46cm, XL 51-59cm, XXL 61-69cm.