The Formula Sports Table Tennis Balls Bulk Pack has 100 orange or white table tennis balls. Packed in a handy reusable bag, they’re an excellent value choice for a seemingly endless supply of balls! Perfect for practicing your game, they’re regulation size (40mm) and have a 1 star rating. Never worry about running out of balls ever again when battling it out with friends and family! 1 Star Rating. Regulation Size 40mm diameter. White or Orange.