Nfiegirl, I “chunky cut” my fabrics (Sue’s instructions call for 8”x10” for these double nine patch blocks) then lay them out flat on an old beach towel. I use a 50-50 mixture of water and Sta-Flo liquid starch in a spray bottle to saturate the fabrics and leave them overnight to dry. I steam them for a crisp fabric that makes cutting and piecing a lot more accurate. I still use Barbara’s recommendations to carefully measure each step of the way. The smaller the pieces, the more important it is to be accurate!
I also used the same background for my double 9-patches, and mathematically figured 3.22 yards for that.
I starched 3-1/2 yards, chunky cut into 10”x 21” pieces.
Hope this helps.