1 euro coin vs Table tennis ball: size comparison
1 euro coin: 2.33 cm. Table tennis ball: 4 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×1.7
1 euro coin
2.33 cm
What is measured Diameter of a 1 euro coin
It weighs 7.5 g and is 2.33 mm thick.
Source : Wikipedia — 1 euro coin
Table tennis ball
4 cm
What is measured Diameter of a table tennis ball
It grew from 38 to 40 mm in 2000 to slow the game down.
Source : Wikipedia — Table tennis