Code point
U+3398
Glyph appearance depends on your fonts.
U+3398
So<square> 006B 2113U+3398 SQUARE KL 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+3398
13208
㎘
㎘
E3 8E 98
3398
00003398
%E3%8E%98
\u3398
\u3398
\u3398
\3398