Code point
U+3322
Glyph appearance depends on your fonts.
U+3322
So<square> 30BB 30F3 30C1U+3322 SQUARE SENTI 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+3322
13090
㌢
㌢
E3 8C A2
3322
00003322
%E3%8C%A2
\u3322
\u3322
\u3322
\3322