Step 3Attaching Elastic
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The elastic needs to be a little shorter then the actual fabric, so that it gathers the fabric. Place the elastic facing down over the right side of the fabric, so that the edges are aligned. Using an overlock stitch (or zigzag), sew over the elastic tape. The stitch should be close to the scalloped edge, but do not step over it. The elastic tape needs to be stretched during sewing, this way the fabric and the elastic will become the same length. The elastic will loosen a little after it is seamed this is why it needs to be just a little shorter from the beginning. In the following picture you a seam in progress and on the other side a seam that is ready for the next step.