Originally Posted by charmpacksplus
Right, they should be 6 inches after they are sewn together. Sounds like you might be using a scant half-inch seam. I put a piece of blue painters tape about 3 inches long at the quarter inch mark and just let the fabric almost touch it as I sew.
I did almost the same thing. I colored permanent marker down the sticky side of a piece of scotch tape, taped it at my 1/4 inch mark,, rubbed it in place well, then peeled the tape off. I had a nice straight line at my 1/4 inch mark instead of tape that I seem to consistently peel the corners up on!