Kettler Table Tennis Balls, 40 mm Regulation Size: 1 Star Rating, 144 Pack (Orange and White) Orange regulation size table tennis balls measure 40 mm in diameter each Playing with a 1-star rated table tennis ball is ideal for both casual and competitive play Delivers true flight, consistent bounce and excellent spin; Includes 144 gross packed table tennis balls Table tennis balls come in an easy-to-open box, eliminating the need to open individual display packaging