What pocket size Vario/Hagner pages do you use?

I use the entire range from 1 to 8 but use way more 7s than any others. That may change one I get my Great Britain stamps in Varios, I think a lot will fit in 8s.

I selected all of them, though I mainly use 2, 6, 7, and 8.

2 of course is for covers and souvenir sheets.

Beyond that, I go for the most efficient arrangement unless I am short on the size I really need.

For categories where there are no major historical shifts or changes in printing technology, such as Ethiopia from about 1960 (change in stamp technology) to 1974 (the coup), I sort stamps by size. There were large-format stamps that could only fit in Vario 4, and many sets just a millimeter too large for vario 6, so I use 5s for those.

I have tried to standardize somewhat on a size to can be be reused later. . I tend to prefer the 5 or 6 row because it is the most flexible for me. I collect more modern so often have taller stamps. In many cases, the page is just a temporary storage so not dedicated.  These are less "efficient" for smaller stamps but.I do not like stamps taller than the pockets.

Now, since I play with Machins (26 mm high) I do have 8 row pages for some of them.   For my postal cards, I deal with 2 pockets mostly even though many work with 3 pocket.

Chris, since you use these in lieu  of album pages I see using the size optimum for page.