You will also need both 3.5mm (US4) and 4.0mm (US6) circular needles 80cm (29-32”) long

FInished measurements;
Back width: 65(68, 72, 76, 780) cm 25.5(27, 28.5, 30, 31.5)“
Finished length: 80(82, 84, 86, 88) cm 31.5(32.5, 33, 34, 34.5)”

Yarn used:
Patons UK Merino Extrafine DK
Forest 00172 12(12, 13, 14, 14) balls