From the book:
Effortless sweater with curved hemline.

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 Orchid
8, 9, 9, 10, 10, 11 skeins
1184, 1332, 1332, 1480, 1480, 1628 yards

Extras:
QTY (8) buttons