Step Four: sewing the armbands
Measure where the side stitching ends and the armhole begins to the shoulder.
Cut a rectangle the same size as the measurement above plus 1/4″ by 5 1/4″ wide.
Fold this rectangle right side out and pin to the wrong side of the top. Repeat the process with the other side of the top. Sew at 5/8″.
Sew the armhole binding at 5/8″.Cut the first two layers of the seam allowance closest to the main fabric.Fold back the first layer of fabric and cut the other two.
This is what your offcuts should look like. Fold and iron the other side of the seam allowance. Stitch close to the edge.Sew the bottom of the sleeve at 1/4″ and iron the seam open. Stitch each side to keep the seam flat.Fold the sleeve up and repeat on the other side.