Dime (US ten cents)
17.91 mm (0.7051 in)
Diameter
The smallest US coin, worth ten cents. Diameter: 17.91 mm.
Published
How big is that?
17.91 mm is 21% of a credit card.
Dime is the smallest of the 39 Classic objects, and the smallest of the 109 objects across all three SizeItUp games.
Size comparison
To scale, smallest to largest: Dime in orange beside the Classic objects nearest in size, in teal.
| Object | Size | vs Dime |
|---|---|---|
| Dime (US ten cents) | 17.91 mm across | – |
| Penny (US one cent)The copper-coloured US cent. Now struck only for collector sets. | 19.05 mm across | 1.1× bigger |
| Nickel (US five cents)The US five-cent coin. | 21.21 mm across | 1.2× bigger |
In other units
| Millimetres | 17.91 |
|---|---|
| Centimetres | 1.791 |
| Metres | 0.01791 |
| Inches | 0.7051 |
| Feet | 0.05876 |
How it's measured
Diameter. US Mint coin specifications.
Sources
- usmint.gov: US Mint coin specifications: dime diameter 0.705 in., 17.91 mm.
- web.archive.org (supporting): Archived copy of the same page, 21 Oct 2026.
Checked against the source on .
Could you have guessed it by eye?
Dime is one of the objects in Classic, a daily size comparison game: you stretch a shape to the size you think is right beside one you know.