Its a nice little holder that keeps two ball nice and neatly together. I used it for two show deodorizers that that were just rolling around in my drawer too much. Base diameter is 39.10 mm so if you dial up the scale you should be able to fit anything in there: golf balls ping pong balls tennis balls pickle balls basket balls (lol) If print them for your sizes just leave a comment for the next person to make it easy for everyone.