A penny is 1.55 millimetres thick. One thousand pennies would be 1.55 x 1000 = 1550 millimetres high. There are 10 millimetres in one centimetre, so the pennies would be 1550/10 = 155 centimetres high.
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15 centimeters
A US penny (US $0.01 coin) is 1.55 mm thick, so multiplying that by 15, a stack of 15 pennies is 23.25 mm or 2.325 cm tall
The thickness of the US 1¢ coin is 1.55 mm. 100 of them in a stack rise to a lofty 155 mm = 15.5 cm.
6 cm tall
7.5 cm