Maybe Janet has a definitive answer for the sashing, but I'm taking a
wild guess here.
I'm not sure what the exact measurements of the sashing strips are, but I estimated about 1.38 yards and rounded up to 1.5 yards will be needed.
Because I don't trust my math (or my cutting!
) I have bought 2 yards of fabric that may be used for the sashing strips. Of course, I'll probably purchase a couple more fabrics that also might work, so I'll have about $60 just in sashing fabrics! LOL!! Makes the TQS kits look like the bargain of the year!