From the Knit Rowan website:
Knit this cosy, oversized top in Big Wool. Designed by Grace Melville it is worked sideways in a simple ridge pattern making it suitable for the beginner knitter.

Finished chest width measurements:
66: 72.5: 78.5: 84.5: 91 cm
26: 28½: 31: 33½: 36 inches

Yarn information:
Photographed with Rowan Big Wool in Prize 064
8, 8, 9, 10, 11 skeins
696, 696, 783, 870, 957 yards