From the Book’s website
Neat classic cardigan
Suitable for the knitter with a little experience

From the Knit Rowan website:

Finished width dimensions:
40.5: 43: 45.5: 48: 50.5: 54.5 cm
16: 17: 18: 19: 20: 21.5 inches

Yarn Information:
Photographed in Angora Haze colorway Squeeze
7, 8, 8, 9, 9, 10 skeins
1050, 1200, 1200, 1350, 1350, 1500, 1500 yards

Alternate Yarn: Pure Wool 4-ply
7, 8, 8, 8, 9, 9 skeins
1218, 1392, 1392, 1392, 1566, 1566 yards

Extras:
QTY (7) buttons