They are all the same 4K and 8K is 3656 x 3112
Correct resolution
'K Cinemascope: 914,778,
2K Cinemascope: 1828,1556,
4K Cinemascope: 3656,3112,
8K Cinemascope: 7312,6224,
16K Cinemascope: 14624,12448,
You’re right, and the item for 16K has the resolution for 8K. Thanks for reporting.
I think all of the Cinemascope resolutions may be wrong though, because they should have an aspect ratio of around 2.4:1 from what I understand…