Code point
U+3348
Glyph appearance depends on your fonts.
U+3348
So<square> 30DF 30AF 30ED 30F3U+3348 SQUARE MIKURON 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+3348
13128
㍈
㍈
E3 8D 88
3348
00003348
%E3%8D%88
\u3348
\u3348
\u3348
\3348