Unicode subsets Wiki

MES-1: 335 charactersVSECS: 361 charactersW1G: 601 charactersWGL4: 657 charactersSECS: 708 charactersMES-2: 1064 charactersMES-3B: 2821 characters

The convention is that character sets that contain WGL4 (those are WGL4, MES-2 and MES-3B) also contain the two private use characters that are included in their count.

Other links:

https://www.cl.cam.ac.uk/~mgk25/ucs/ — a directory of the creator of VSECS and SECS</li></ul>