Chunk Size

For this I tested with -Skyrim 202X 10.0.1 - Architecture PART 1-2347-10-0-1710488193. I removed all non regular textures, i.e. those ending with _n.dds and _p.dds as most game mods don't ship normals etc.

Results:

Block Size	File Size (MiB)
Uncompressed	9695.84
128K	7739.02
1M	7373.02
4M	7097.22
8M	7007.22
16M	6965.84
32M	6946.49
64M	6938.88
256M	6934.86

File Size Distribution:

Row	Start	End	Files
1	21.5 kB	14.2 MB	101
2	14.2 MB	28.5 MB	40
3	28.5 MB	42.7 MB	52
4	42.7 MB	56.9 MB	0
5	56.9 MB	71.1 MB	0
6	71.1 MB	85.3 MB	68
7	85.3 MB	99.6 MB	0
8	99.6 MB	113.8 MB	0
9	113.8 MB	128.0 MB	0
10	128.0 MB	142.2 MB	0
11	142.2 MB	156.4 MB	0
12	156.4 MB	170.7 MB	1