You will need an additional size US 4 (3.5 mm) needle for the 3-needle bind off on the shoulders.
You will also need a size US 3 (3.25 mm) circular needle no longer than 16’ (40 cm).

You will also need 10 buttons for the side fastenings. Rowan used approx 3/4” (2 cm) buttons with two holes in each.

Finished measurements:
Bust circumference: 40 (44, 48.25, 51.75, 55.75)“ 101.5(112, 122.5, 131.5, 141.5) cm
Finished length: 28.75(29.5, 30.5, 31.25, 32)” 73(75, 77.5, 79.5, 81.5) cm
Sleeve to armhole: 17.75(17.75, 18, 18, 18)“ 45(45, 46, 46, 46) cm

Yarn used:
Rowan Baby Cashsoft Merino
Shade 125 Cecliy - 11(13, 14, 15, 16) balls