FunnyDogClothes Dog Pet Puppy Safety REFLECTIVE Collar Glow Nylon DELIVERY TIME 2 - 4 DAYS! PLEASE measure you pet. XXS/XS: Neck 8" - 12" Width 3/8" S/M: Neck 12" - 18" Width 5/8" L/XL: Neck 14" - 22" Width 1"