EDGING FOR BACK OPENING
With RS facing, join yarn at top corner of back opening, sl st along first side of opening, sl st along next side of opening, working 6 ch-3 button lps, with the first and last ones at upper and lower edge of back opening with rem 4 lps spaced evenly in bet. Sew buttons in place to correspond to button lps. Try on garment with opening at center back. Position Strap ends on front and back Bodice, adjusting length as desired. Sew Strap ends in place.
Making a chain 55 inches in length. Fasten off. Weave ends through ch-2 sps on drawstring band, so that ends extend at center front. Tie an overhand knot in each end of drawstring.