The Greek Small Letter Sampi symbol (ϡ). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Greek Letters.
The quickest way is to copy ϡ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
ϡ is U+03E1 (decimal 993).
Use ϡ in HTML to render ϡ on a web page.
On Windows you can type it with Alt+993 (hold Alt and enter the number on the numeric keypad).
Yes — copying is completely free and unlimited, and works right in your browser with no sign-up.