Code point
U+25FE
Glyph appearance depends on your fonts.
U+25FE
SmU+25FE BLACK MEDIUM SMALL SQUARE is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25FE
9726
◾
◾
E2 97 BE
25FE
000025FE
%E2%97%BE
\u25FE
\u25FE
\u25FE
\25FE