We love taking our dogs out at night as they love to stir up (hunt) all sorts of wildlife! Other times we just want to go on a nice walk or take them camping! The IT'S RIDIC! LED collars keep our dogs visible to our eye as well as cars and other pedestrians. We loved the idea of the LED collar so we are bringing them to you! :) Please check available sizes for your dog! SMALL Neck Size 14" - 17" MEDIUM Neck Size 17" - 20" LARGE Neck Size 20" - 25"