Wool and the Gang recommends using circular needles and working forwards and backwards.

Finished measurements:
Chest circumference: 34.2( 36.6, 40.6, 44.8)“ 87( 93, 103, 114) cm
Finished length: 18.1( 18.5, 19.3, 20.1)” 46( 47, 49, 51) cm

Yarn used:
Wool and the Gang The One Cotton 4(4, 5, 5) balls