You will need one button. Rowan used BN1368 from Bedecked.

You will also need a cable needle.

Finished measurements:
Back width: 25(27, 29, 31, 33)“ 64(69, 74, 79, 84) cm
Total length: 27(27.5, 28.5, 29, 30)” 68(70, 72, 74, 76) cm

Yarn used:
Rowan Felted Tweed Aran
Color 777 Clay - 13( 14, 15, 17, 18) balls