In order to get a perfect 1/4 inch binding on the front and on the back you have to stitch your binding on with a scant 1/4 inch seam. By the time you stitch your seam and then turn the binding to the back to stitch , the fabric tends to add at least 1/16" to the binding finish. I solve this by first cutting my bindings 1 78" folded in 1/2 and stitched on at a scant 1/4" seam. Also stitch your corners down, judges don't like the seam gapping. Good Luck with your entry.