The Sinhala block spans U+0D80–U+0DFF, 128 codepoints in Plane 0 (Basic Multilingual Plane). 91 are assigned in Unicode 16.0; the other 37 are reserved for future characters.
All of its characters belong to the Sinhala script.
By general category: 59 other letters (Lo), 15 spacing marks (Mc), 10 decimal digits (Nd), 6 non-spacing marks (Mn), 1 other punctuation (Po).
The first 80 arrived in Unicode 3.0 (1999); later additions came in 7.0 (10), 13.0 (1).