# Coin sizes: US penny to dollar and euro coins (diameter × thickness)

> What is the diameter of a US quarter?

- Category: Everyday objects › Coins
- Kind: Standard part
- Basis: US Mint coin specifications; European Central Bank euro coin specifications
- Page: https://xemstudio.com/objects/coins-us-and-euro/ · JSON: https://xemstudio.com/api/geometry?object=coins-us-and-euro · Plain text: https://xemstudio.com/objects/coins-us-and-euro/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Plain discs at the official diameter and thickness, for coin holders, slots, sorters and counterweights; no design is reproduced.

## Sizes

| coin | diameter_mm | thickness_mm |
|---|---|---|
| US cent (penny) | 19.05 | 1.52 |
| US 5 cents (nickel) | 21.21 | 1.95 |
| US 10 cents (dime) | 17.91 | 1.35 |
| US 25 cents (quarter) | 24.26 | 1.75 |
| US half dollar | 30.61 | 2.15 |
| US dollar coin (golden dollar) | 26.49 | 2.0 |
| 1 euro cent | 16.25 | 1.67 |
| 2 euro cent | 18.75 | 1.67 |
| 5 euro cent | 21.25 | 1.67 |
| 10 euro cent | 19.75 | 1.93 |
| 20 euro cent | 22.25 | 2.14 |
| 50 euro cent | 24.25 | 2.38 |
| 1 euro | 23.25 | 2.33 |
| 2 euro | 25.75 | 2.2 |

## Where the files are

- US Mint: [Coin specifications](https://www.usmint.gov/learn/coins-and-medals/circulating-coins) — web — US Mint; dimensions are facts
- European Central Bank: [Euro coins: specifications](https://www.ecb.europa.eu/euro/coins/html/index.en.html) — web — European Central Bank; dimensions are facts

## Free STEP/STL (14 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/coins-us-and-euro/index.json

- coin-us-penny: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-penny.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-penny.stl) — US cent (penny): Ø19.05 × 1.52 mm (plain disc, no design)
- coin-us-nickel: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-nickel.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-nickel.stl) — US 5 cents (nickel): Ø21.21 × 1.95 mm (plain disc, no design)
- coin-us-dime: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-dime.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-dime.stl) — US 10 cents (dime): Ø17.91 × 1.35 mm (plain disc, no design)
- coin-us-quarter: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-quarter.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-quarter.stl) — US 25 cents (quarter): Ø24.26 × 1.75 mm (plain disc, no design)
- coin-us-half-dollar: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-half-dollar.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-half-dollar.stl) — US half dollar: Ø30.61 × 2.15 mm (plain disc, no design)
- coin-us-dollar-coin: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-dollar-coin.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-us-dollar-coin.stl) — US dollar coin (golden dollar): Ø26.49 × 2.0 mm (plain disc, no design)
- coin-euro-1c: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-1c.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-1c.stl) — 1 euro cent: Ø16.25 × 1.67 mm (plain disc, no design)
- coin-euro-2c: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-2c.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-2c.stl) — 2 euro cent: Ø18.75 × 1.67 mm (plain disc, no design)
- coin-euro-5c: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-5c.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-5c.stl) — 5 euro cent: Ø21.25 × 1.67 mm (plain disc, no design)
- coin-euro-10c: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-10c.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-10c.stl) — 10 euro cent: Ø19.75 × 1.93 mm (plain disc, no design)
- coin-euro-20c: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-20c.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-20c.stl) — 20 euro cent: Ø22.25 × 2.14 mm (plain disc, no design)
- coin-euro-50c: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-50c.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-50c.stl) — 50 euro cent: Ø24.25 × 2.38 mm (plain disc, no design)
- coin-euro-1: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-1.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-1.stl) — 1 euro: Ø23.25 × 2.33 mm (plain disc, no design)
- coin-euro-2: [STEP](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-2.step) · [STL](https://xemstudio.com/files/hardware/coins-us-and-euro/coin-euro-2.stl) — 2 euro: Ø25.75 × 2.2 mm (plain disc, no design)

## Questions

**US quarter?**

24.26 mm across, 1.75 mm thick.

## Fits with

- [Credit card and ID card sizes (ISO/IEC 7810 ID-1: 85.60 × 53.98 × 0.76 mm), SIM cards, business cards](https://xemstudio.com/objects/id-cards-and-sim-cards/)