A tick ("check" in American English) symbol in a box. Note that the file is redirected by "☑.svg", which is the Unicode character for the symbol in question (U+2611). If your computer displays something like a question mark or an empty box instead, then you have a font problem. But don't worry. You can still copy and paste either ☑.svg or Check mark.svg into an article and it will appear correctly. Don't be deceived by the tiny size of this image. It is fully scalable.
Own work
Erin Silversmith