A standard U.S. quarter has a thickness of 1.75 mm. This precise measurement ensures consistency in coin production and vending machine functionality.
Understanding Quarter Specifications
Beyond its thickness, a quarter has other specific dimensions and features that are part of its design and manufacturing. These characteristics help identify the coin and ensure its proper use in commerce.
Here are the key specifications for a U.S. quarter:
| Specification | Measurement |
|---|---|
| Diameter | 24.26 mm |
| Thickness | 1.75 mm |
| Edge | Reeded |
| No. of Reeds | 119 |
The Importance of Coin Thickness
The precise thickness of a coin is crucial for several reasons:
- Vending Machines: Automated systems rely on exact coin dimensions to identify and accept currency. Variations in thickness could lead to jams or incorrect coin recognition.
- Durability: A consistent thickness contributes to the coin's structural integrity, ensuring it can withstand daily circulation without easily bending or deforming.
- Stackability: Uniform thickness allows coins to stack neatly, which is important for banking and counting.
The reeded edge, with its 119 small ridges, also serves a practical purpose. Historically, reeding was introduced to prevent people from shaving small amounts of precious metal from the edges of coins (known as "clipping" or "shaving"), which would reduce the coin's value. Today, it also helps visually impaired individuals distinguish between different coin denominations.
