The Diameter Sign symbol (⌀). Copy and paste it, or use its Unicode, HTML, and CSS codes.
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The quickest way is to copy ⌀ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
⌀ is U+2300 (decimal 8960).
Use ⌀ in HTML to render ⌀ on a web page.
On Windows you can type it with Alt+8960 (hold Alt and enter the number on the numeric keypad).
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