Code point
U+3006
Glyph appearance depends on your fonts.
U+3006
LoU+3006 IDEOGRAPHIC CLOSING MARK is a Unicode 16.0.0 character in the Other Letter category. It belongs to the CJK Symbols and Punctuation block.
Choose the representation you need, then copy its value.
U+3006
12294
〆
〆
E3 80 86
3006
00003006
%E3%80%86
\u3006
\u3006
\u3006
\3006