Color A for the medium and large size, Medium size will end off, go to Round 9. Color A for the large size only. 1 dc in the top of the turning Ch. Work other strap to correspond. Small size end off.
Small size end off.
Repeat Row 2 for the pattern. Use Color C. End off. For an open crochet back, work the same as the front. K 1, P 1, in ribbing across the row. Repeat Row 1 until the piece measures the same length as the front to the bottom of the armhole.