MR CHIPS Professional Ping Pong Balls/Bingo Balls for Manual Bingo Cages - Numbered and Matte Finish White Color BINGO BALLS SET: White bingo balls size is 38 mm (1 1/2") in diameter, don't be confused with 40 mm. DOUBLE SIDE PRINT: Large letters & numbers printed in black ink on two side of bingo number balls. 75 BALLS SET: Premium ping pong balls set includes 75 bingo balls numbered B1-O75 w/ brown box. AFFORDABLE PACK: Pack of bingo balls replacement are money saver! Buy direct from manufacturer. CUSTOMER CENTRIC: As a premium brand, we adhere to best product & the most uncompromising quality.