Code point
U+3330
Glyph appearance depends on your fonts.
U+3330
So<square> 30D4 30B3U+3330 SQUARE PIKO 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+3330
13104
㌰
㌰
E3 8C B0
3330
00003330
%E3%8C%B0
\u3330
\u3330
\u3330
\3330