Dogs Kingdom Soft Leather Luxury Crystal Rhinestone Skull Dog Collars Pet Necklace Black Design:Rhinestones Skull pet collar,fashion and high quality XSOverall length 12"(30*1.5cm), will fit 8"-10"(20-26cm) neck SOverall length 14.5"(37*1.5cm), will fit 10"-13"(27-33cm) neck MOverall length 16.5"(42*2cm), will fit 12"-15"(29-38cm) neck LOverall length 20"(51*2.5cm), will fit 14"-18" (36-46cm)neck