Place the neck band with the right sides together and sew across the short edges to create a circle.
Fold the neck band in half along the length with the wrong sides on the inside and press double.
Match up the seam on the neck binding with a shoulder seam, pin with right sides together and the raw edges level.
Gently ease and stretch the binding to fit around the neckline. Sew with a stretch stitch or an overlocker all the way round the neck.
Place the neckline flat on the ironing board and gently steam the seam allowance away from the binding. The binding may well look wavy to start with but steam it and it will shrink into shape.
Top-stitch around the neckline through the seam allowance with a stretch stitch or twin needle.