Code point
U+FFEE
Glyph appearance depends on your fonts.
U+FFEE
So<narrow> 25CBU+FFEE HALFWIDTH WHITE CIRCLE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Halfwidth and Fullwidth Forms block.
Choose the representation you need, then copy its value.
U+FFEE
65518
○
○
EF BF AE
FFEE
0000FFEE
%EF%BF%AE
\uFFEE
\uFFEE
\uFFEE
\FFEE