That is because the outer edge and the inner edge of your binding will have a different length. No stretch, and things won’t lie flat (aka gape) If you simply sew the binding to the fabric, things will be fine at the outer edge of your binding. But the

Self-binding (sometimes called Edge-turned Binding) This type of binding protects the quilt's edges with just a single layer of fabric. For this method, the quilt's backing fabric is trimmed straight and wrapped around to the front of the quilt an

Quilt binding is the fabric that's used to cover the outer edges of the quilt sandwich — the quilt top, batting, and backing — after the quilt is quilted. Binding keeps the edges intact and can add another element to the quilt's design. Sewing