You will need a set of 4 dpn needles size US3 (3.25 mm)
You will also need size US6 (4.0 mm) circular needles - one no longer than 12” (30 cm) long, and one at least 60” (180 cm) long , and lengths between as available.

Finished measurements:
Back width (just the back) cuff to cuff: 63(69.25, 75.5)“ 160(176, 192 cm)
Finished length: 21.5” (54.5 cm) for all

Yarn used:
Rowan Summerlite Cotton
Shade 452 Plaster - 12(12, 13) balls