The Chakma block spans U+11100–U+1114F, 80 codepoints in Plane 1 (Supplementary Multilingual Plane). 71 are assigned in Unicode 16.0; the other 9 are reserved for future characters.
All of its characters belong to the Chakma script.
By general category: 38 other letters (Lo), 16 non-spacing marks (Mn), 10 decimal digits (Nd), 4 other punctuation (Po), 3 spacing marks (Mc).
The first 67 arrived in Unicode 6.1 (2012); later additions came in 11.0 (3), 13.0 (1).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.