Code point
U+339D
Glyph appearance depends on your fonts.
U+339D
So<square> 0063 006DU+339D SQUARE CM 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+339D
13213
㎝
㎝
E3 8E 9D
339D
0000339D
%E3%8E%9D
\u339D
\u339D
\u339D
\339D