If you mean the thickness, it's 1.95mm. The diameter is 21.2mm
Nickel
The standard diameter of a US nickel is 21.2 mm so its radius is half that, or 10.6 mm
The face of a US nickel is circular so it has a diameter, not a length and width. According to the US Mint the coin is 21.2 mm in diameter and 1.95 mm thick.
depends on the dimensions of the nickel coin....
A US 5 cent coin (a nickel) has a diameter of 21.21 mm -. That is 2.121 cm
It is 48.75 mm (1.92 inches) for US nickel 5-cent coins. US nickels are 1.95 mm thick. For Canadian nickels, the height is 44 mm (1.73 inches). Canadian nickels are only 1.76 mm thick.
US nickels are 1.95 mm thick. Other dimensions: > Diameter: 21.2 mm > Weight: 5.00 gm > Composition: A solid alloy composed of 75% copper and 25% nickel. The nickel is now the only circulating US coin to be made of a solid alloy. Cents are zinc plated with copper, and other denominations are clad "sandwich" coins.
US nickels have a diameter of 0.835 inches and a thickness of 0.077 inches. However, coin dimensions are normally measured in millimeters so those numbers are 21.2 mm by 1.95 mm.
All standard US nickels are 21.2 mm in diameter; one US inch is 25.4 mm. If your coin isn't the same size as a current Jefferson nickel it's a novelty item that sells in gift shops for a few dollars.
Half-dimes were tiny (14 mm) coins issued up till 1873. The reason your coin is the size of a nickel (21 mm) is that it IS a nickel. However, without a date it's not possible to give a specific value. Please enter a new question in the form What is the value of a [date] US nickel? for a specific answer. (date = your coin's date)
According to the US Mint:Composition: Outer layers of 75% copper / 25% nickel bonded to a core of pure copper, for an overall composition of 8.33% nickel and 91.67% copper.Weight: 5.67 gmDiameter: 24.3 mmThickness: 1.75 mm
The US coin named after an element is the nickel. It is composed mainly of copper and nickel, hence the name.