You will need double-pointed needles size US 3 (3.25 mm) for the drawstring. You will not need size US 3 (3.25 mm) needles for the body - just the US 6 (4.0 mm) needles

Design is worked in two rectangles and then sewn together at shoulders and side seams

Finished measurements:
Bust circumference: 63.25(67, 71.5, 75.25, 79.5, 82.75)“ 160(170, 181, 191, 202, 210) cm
Finished length: 31.5(33.75, 35.75, 37.75, 39.75, 41.5)” 80(85.5, 90.5, 95.5, 100.5, 105.5) cm

Yarn used:
Sirdar Cotton DK
Shade 539 Coppertone - 7(7, 8, 9, 10, 11) balls