This is a silver tulle collar bow or a topknot bow. 3" topknot or collar bow, 4" collar bow or 5" collar bow. Choose the smaller size for dogs weighing 8 lbs or less. 4" for 8-25 pounds 5" for over 25 pounds. Made with 2 latex bands. Just insert the collar bow at the end of the collar and slide it to where you want it to set.