Code point
U+3390
Glyph appearance depends on your fonts.
U+3390
So<square> 0048 007AU+3390 SQUARE HZ 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+3390
13200
㎐
㎐
E3 8E 90
3390
00003390
%E3%8E%90
\u3390
\u3390
\u3390
\3390