LiteXim 2.5 cm Width Adjustable Pet Collar Led Light Fashionable Flashing Nylon LED Light Pet Dog Safety Collar,6 Colors for Your Choice Nylon collar, 100% quality guaranteet.size map at the left picture column, Pls confirm it before you place a order. The Item have three modes: 1.Steady On 2.fast flash 3.normal flash You get 60 hours of steady light, or over 100 hours of flashing light with each collar Switch on/off the collar light manually.You can turn on the collar light at night while turn it off daytime 4 Colors for your choice:Blue,Green,Orange,Pink .Width 2.5cm (1 Inch),Every one have 8cm flexible range. 3 sizes: Small(22-40 cm),Medium(32-50cm),Large (48-60). The Collar band it stretchable