Code point
U+3301
Glyph appearance depends on your fonts.
U+3301
So<square> 30A2 30EB 30D5 30A1U+3301 SQUARE ARUHUA 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+3301
13057
㌁
㌁
E3 8C 81
3301
00003301
%E3%8C%81
\u3301
\u3301
\u3301
\3301