Take the 11" x 14" piece of fabric and press 1/4" to the wrong side on both of the 14" sides. Unfold the 1/4" and sew the two 11" sides (right sides together ) using a 5/8"th seam backstitching at top and bottom. Press the seam open. Repress the 1/4" folds across the seam. You now have a tube with both ends of the tube folded under one-fourth inch
Like this
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