Originally Posted by
joe'smom
Marcia, did you check the width of your strip sets before proceeding? That's how you would tell if you need to change your seam allowance. Keep trying until the strip sets come out exactly the right width. Once you've established your seam allowance, make about five sample 4-patches to make sure things are coming out right. It can take quite a while getting the seam allowance right, but never was time better spent.
.
Another wee tip for when using such small pieces - when you come to line your two layers of fabric together, don't line up at the seam edge, line them up at the opposite side instead - the outside edge if you will. That way, if there is any discrepancy in the width of the strips, this difference will be lost into the seam allowance instead of at the outside edge of your unit.
K