Slide onto the collar dog bandana in four different sizes S = 5 - 20 lbs (1/2 in collar width) M = 20 - 65 lbs (3/4 - 1 1/2 in collar width) L = 65+ lbs (3/4 - 2 in collar width) All of our bandanas are machine washable (Wash on cold and hang to dry) and easy to slip on and off of the collar easily and provide a fun bold fashion statement for your pup! ~Contact me for any other customization requests~