From the Knit Rowan website:
Knit this mens striped sweater from Designer Knits. A design by Martin Storey using the beautifully soft, traditionally spun yarn Rowan Tweed (wool), this pattern features an interesting contrast stripe, shawl neck collar and set in sleeves.

Finished chest dimensions:
118; 131; 143; 156 cm
46.5; 51.5; 56.25; 61.5 inches

Yarn Information:
A - Askrigg 585
9, 10, 11, 12 skeins
1161, 1290, 1419, 1548 yards

B - Buckden 584
5, 6, 7, 8 skeins
645, 774, 903, 1032 yards