The size of coins can be used to describe the size of a lesion or can determine if a coin can pass through an opening. The latter is important for patients who swallow coins intentionally or by accident.
US Coin
Diameter
Weight
penny
19.05 mm (0.75 in)
2.5 grams
nickel
21.21 mm (0.835 in)
5.0 grams
dime
17.91 mm (0.705 in)
2.27 grams
quarter
24.26 mm (0.955 in)
5.67 grams
half dollar
30.61 mm (1.205 in)
11.34 grams
dollar
38.1 mm (1.5 in)
24.59 grams
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