Pickleball Marketplace - (2) Pickleball Keychains The keychains have a 7 inch 2.4 mm nickel ball chain with a small plastic pickleball. Don't get your bags confused with others; the keychains are a great way to mark your personal bag. These key chains are also a great gift or, make a great "goody bag" item for tournaments. For the Pickleball Player who has everything!