Dog Puppy Collar – PU Leather Rhinestone Crystal Bling Bone Collar – XS S M L Durable Strong PU Faux LeatherAdjustable CollarSparkling Bone Rhinestones on collar and on rhinestones on the buckle Size XS have 3 bones and sz S, M, L have 4 bonesSizingPlease add 1 – 1.5″ for a more comfortable fit. X-Small 8-10.5″ 3 Bones 5/8″ w (collar measures 12 1/2″ incl buckle) Small 10.5-13″ 4 Bones 5/8″ w (collar measures 15″ incl buckle) Medium 11.5-15″ 4 Bones 3/4″ w (collar measures 17 1/4″ incl buckle) Large 14.5-18″ 4 Bones 1″ wide (collar measures 21″ incl buckle)