You will need stitch holders.

Finished measurements:
Chest circumference: 29.5( 32.5, 34.5, 37.5, 40)“ 75(82, 88, 95, 102) cm
Finished length: 16.75( 17.75, 19.25, 20.75, 23.25)” 41(45, 49, 53, 59) cm
Sleeve length: 9.5(11, 12.5, 14.25, 16.25)“ 24(28, 32, 36, 41) cm

Yarn used:
Rowan Alpaca Classic
Shade 131 Iced Blue - 9(9, 10, 11, 11) balls

• pattern in book states 20” (but this is a typo - it should be 40”)