Unfold bias binding along one edge. Pin this (with right sides together) to armhole, lining up raw edges neatly. Stitch along the fold line of the bias binding, at 6 mm seam allowance.
Repeat for other armhole.
Be you. Everyone else is taken.
Unfold bias binding along one edge. Pin this (with right sides together) to armhole, lining up raw edges neatly. Stitch along the fold line of the bias binding, at 6 mm seam allowance.
Repeat for other armhole.