pleating to the sett vs. stripe

[M. A. C. Newsome]

Is it the number of pleats that increased your pictured box pleat to 6 yards?
What is it that required the additional 2 yards? BTW, that tartan looks grand box pleated which tartan is that? Thanks

Well, the tartan has an unusually large repeat, I think it was about 10". If I did a four yard box pleated kilt, that would have resulted in very wide pleats, about 3.25", which I did not want. So the extra two yards allowed me to have more, narrower pleats.