When you make a paper pattern for a neckline, you should mark the center or the axis as the hole's quite asymmetric if you take the front and back. I pinned a rectangle from the other side - you can notice that I attached its corners as well, as I'm able to sew them accidentaly to the neck..
I pinned it this way not to have to pull them out when sewing. Serging..
After that I cut the hole several milimeters from stitches and turned over. And ironed. Now I iron everything :-D
Two lines of attaching stitches and done :) But you must be bored by this as I've decribed it many times here..
