The Double Prime symbol (″). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Punctuation.
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+2033 (decimal 8243).
Use ″ in HTML to render ″ on a web page.
On Windows you can type it with Alt+8243 (hold Alt and enter the number on the numeric keypad).
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