I always get a Man's SW that is at least 2 sizes larger than I need, cut it apart, decorate it with whatever, measure shoulder and then mark on SW where to cut and trim the shoulder. Sew the sleeve back on. Some time the cuff has to be adjusted for your length of sleeve. I save the bottom SW trim for the neck and make my cuffs out of left over fabric from the design fabric. I also make a facing for the neck and open area down the front.