Code point
U+3357
Glyph appearance depends on your fonts.
U+3357
So<square> 30EF 30C3 30C8U+3357 SQUARE WATTO 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+3357
13143
㍗
㍗
E3 8D 97
3357
00003357
%E3%8D%97
\u3357
\u3357
\u3357
\3357