This is a single neck tie that will fit over any collar that you already have at home. The tie wraps around the collar and attaches with velcro. They are fully washable. Newt is wearing a tie with 5-6 inch length. This listing is for a larger dog . The length of this tie is approx 10-11 inches long and looks great on a Lab sized dog . For each tie that is sold, we will donated $1.00 to Castaway Critters here in Central PA. Please specify red or blue when ordering.