In 2000, the table tennis federation voted to increase the diameter of the ping pong ball from 38mm to 40mm to make it easier to learn and make the sport better for TV. It was the first major change to the sport since 1937. – WTF Fun Facts
Source: http://news.bbc.co.uk/2/hi/sport/tennis/654102.stm
WTF Fun Fact – Larger Ping Pong Balls
