Ball math
A regulation table-tennis ball is 40 mm in diameter and weighs 2.7 grams.
Small ball. Surprisingly tidy numbers.
Standard-defined
How certain is this?
Values fixed by the governing rules of the sport.
Keep going
- Measurement trap42.67 mm isn’t “the diameter of a golf ball.”
- Product scaleAn iPhone 13 is 146.7 mm tall.
- Stack it upAbout 1,045.
- Stack it upAbout 110,000 quarters stacked flat would reach the top of the Gateway Arch.
- How many highThe Gateway Arch is about 1,309 iPhone 13s tall.
- Product scaleOne meter is about 6.8 iPhone 13s.