The Supplemental Punctuation block spans U+2E00–U+2E7F, 128 codepoints in Plane 0 (Basic Multilingual Plane). 94 are assigned in Unicode 16.0; the other 34 are reserved for future characters.

All of its characters have the script value Common: they are shared across writing systems rather than tied to one.

By general category: 56 other punctuation (Po), 9 opening brackets (Ps), 8 closing brackets (Pe), 6 opening quotes (Pi), 6 closing quotes (Pf), plus smaller groups.

The first 26 arrived in Unicode 4.1 (2005); later additions came in 5.1 (23), 5.2 (1), 6.1 (10), 7.0 (7), 9.0 (2), and 5 later versions.