From the Knit Rowan website:
Knit this mens sweater with open neck, a design from the Rowan archive that is now available to purchase online. Designed by Martin Storey using the lovely dry handle summer yarn Creative Linen (cotton and linen), this slouchy sweater is knitted in an all over basket style stitch and has set in sleeves.

Finished width dimensions:
58, 63, 69, 75, 82 cm
23, 25, 27, 29.5, 32.5 inches

Yarn Information:
Photographed in Denim 630
8, 9, 9, 10, 11 skeins
1752, 1971, 1971, 2190, 2409 yards