Correction for the size of a Tennis Ball
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How big is 30,000 microliters?
It's about one-fifth as big as a Tennis Ball
The size of a Tennis Ball is about 157,500 microliters.
(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must measure 6.54 cm to 6.86 cm in diameter, for a total volume of 157,500 microliters. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.