Code point
U+25E8
Glyph appearance depends on your fonts.
U+25E8
SoU+25E8 SQUARE WITH RIGHT HALF BLACK is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25E8
9704
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E2 97 A8
25E8
000025E8
%E2%97%A8
\u25E8
\u25E8
\u25E8
\25E8