How to stitch the neck opening

If the neck is small an opening can be made in front or back of the garment,Mark opening a-b on the garment.Do not cut.Cut a piece of facing P Q X Y, 4” wide and and the length being 2”more than the length of the opening.Mark the line of the opening of the same length on the facing also. Turn1/4 “ under on sides and bottom of the facing ( x-p, p-q and q-y). Fold the facing on the line a-b.Place the edge against the line a-b marked on the garment,keeping right sides together.Line a-b on the garment should coincide with the line a-b on the facing.Secure them with pins.Stitch along the m-b and n-b. (Slant lines} m-a = a-n =1/4” Reinforce at the point b.Cut along the line a-b taking care not to cut the stitches.Turn the facing to the wrong side.Crease along the seam line and press.Hem the edges x-p,p-q and q-y to the garment.