Staystitch Curved Edges Before Sewing Garment
When working with garment pieces that have curved or semi-curved edges, it is highly recommended taht you stitch within the seam allowance of these curved edges to prevent them from stretching and loosing their shape during the garment's construction process. This is often the case with curved neckline, and armhole edges which tend to be more vulnerable in the handling process.
A staystitch is a simple straight stitch that is applied close to the seamline but within the seam allowance area of a curved or semi-curved edge to stabilize it and maintain it's shape and structure. Staystitching is a purely functional technique used only to aid in the construction process thus it should not be visible ion the right side of the finished garment. Staystitching should be applied along all vulnerable and curved edges, right after the fabric pieces are separated from the sewing patterns but before beginning any of the garment construction steps. Staystitching is often considered the very first step in the sewing (dressmaking) process.