Code point
U+3397
Glyph appearance depends on your fonts.
U+3397
So<square> 0064 2113U+3397 SQUARE DL 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+3397
13207
㎗
㎗
E3 8E 97
3397
00003397
%E3%8E%97
\u3397
\u3397
\u3397
\3397