A US dime.
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The United States dime (10 cents) has 118 edge ridges. The coin is 17.91 mm in diameter and is 1.35 mm thick
According to the US Mint, a dime has 118 reeds/ridges.
there are 118 ridges on a u.s. dime
A US dime(10 cents) has 118 ridges to be exact.
The ridges around the edge of a dime is called reeding or milling. There are 118 ridges.