The Osage block spans U+104B0–U+104FF, 80 codepoints in Plane 1 (Supplementary Multilingual Plane). 72 are assigned in Unicode 16.0; the other 8 are reserved for future characters.
All of its characters belong to the Osage script.
By general category: 36 uppercase letters (Lu), 36 lowercase letters (Ll).
The first 72 arrived in Unicode 9.0 (2016).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.