Diameter of an Australian penny (no longer currency) is 1 and 3/16".
There are several countries in which the minor currency unit is a penny - including the US where a cent is called a penny!The UK penny has a diameter of 20.3 mm.
The diameter does not affect the length. It is a separate dimension. Diameter is the cross sectional measure of a circular object.
this depends on which penny you are asking about.The US penny, the Australian penny, the British penny, Canadian penny and the Irish penny coin.Each one is a different size and weight.Diameter of an Australian penny (no longer currency) is 1 and 3/16".Diameter of an old British penny (no longer in use) was 1.25". Modern pennies are 20.03 mm, or about 4/5"Diameter of a U.S. cent (penny) - 0.75"
A millimetre: diameter of a pin head.
19 millimeters
English penny of today: 3,56 g and 20,32 mm.
You would use millimetres.
The answer depends on which country's penny the question is about. Many countries use a penny as a minor currency unit and since you have not bothered to share the name of the country, I cannot provide a more useful answer.
It is .25 mm that is the larger diameter
The circumference of a circle with a 10 millimeter diameter is about 31.42 mm
millimeter
The diameter of a US penny is 0.01905 metres
The diameter is twice the radius so the answer is 12 millimeters.
The diameter of the bullets
Diameter of an Australian penny (no longer currency) is 1 and 3/16".
The answer is 5.21 millimeter's.