Loungefly Scooby-Doo Mystery Machine Medium Dog Collar new with tags Scooby-Doo collar! Colored like the Mystery Machine, this adjustable accessory features vibrant prints of the van, its flowers, and Scooby-Doo himself, along with a metal paw print charm. It's perfect for your next walk—or, like, run! Size medium and size large available Plastic; polyester Strap approx. 3/4" W Size medium; neck measurement 13-20 Plastic; polyester Strap approx. 1" W Size large; neck measurement 18-29"