MTS

I just used 8" in my reply because it looked proportionally right to me.

These strips are all for the background fabric, right?

I think the 3.5" is for the top and bottom strip of the middle section. Make sense?

And since Atkinson patterns are notoriously easy and proportional - as in 3,6,9 or 2,4,6,12....

The question then is how you were supposed to cross cut the 6.5" strips.

There would be on 12.5" strip for the background.

But it looks like maybe you also were to cross-cut the 6.5" into 4.5" (4" finished) widths for the contrasting rectangle.

Again, I'm just looking at the pattern. But it you're sure it was 12" finished blocks, it makes sense to me.

Or instead of a 4/2 split, maybe it was 4.5/1.5.

What do you think?