MR CHIPS Professional Ping Pong Balls/Bingo Balls - Single Number Matte Finish - Multicolor PREMIUM PING PONG BALLS: The size is 38 mm (1 1/2") in diameter, not to confuse with 40 mm balls. LARGE PRINT: Large letters and numbers printed in black ink on professional ping pong balls set. SET: 75 bingo balls replacement numbered B1-O75 in 5 colors- red, blue, green, yellow & white. AFFORDABLE PACK: Pack of 75 professional ping pong bingo balls/ colorful ping pong balls. CUSTOMER CENTRIC: As a premium brand, we adhere to best product & the most uncompromising quality.