Code point
U+3321
Glyph appearance depends on your fonts.
U+3321
So<square> 30B7 30EA 30F3 30B0U+3321 SQUARE SIRINGU is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+3321
13089
㌡
㌡
E3 8C A1
3321
00003321
%E3%8C%A1
\u3321
\u3321
\u3321
\3321