From the Knit Rowan website:
Knit this man’s slip stitch Tweed stripe jumper from Rowan Knitting & Crochet Magazine 57, a design by Carlo Volpi using Revive (silk cotton and viscose) and Creative Linen (linen and cotton) with long sleeves and round neck. This knitting pattern has a three star difficulty rating.

Finished chest width dimensions:
50.5: 53.5: 56.5: 59.5: 61.5: 64.5 67.5 cm
20: 21: 22: 23½: 24: 25½: 26½ inches

Yarn information:
Rowan Purelife Revive
A - Shale 481
8, 9, 10, 11, 11, 12, 13 skeins
1096, 1233, 1370, 1507, 1644, 1781 yards

Rowan Creative Linen
B - Darkness 636
1, 2, 2, 2, 2, 2, 2 skeins
219, 438, 438, 438, 438, 438, 438 yards

C - Teal 625
1, 1, 1, 1, 2, 2, 2 skeins
219, 219, 219, 219, 438, 438, 438 yards

Gauge notes:

• Using yarns A and B (on body sections) 20 stitches and 42 rows to 10 cm measured over design pattern using recommended 4mm (US 6) needles.
• Using yarn A only (on sleeves) 20 stitches and 42 rows to 10 cm measured over design pattern using recommended 4.5mm (US 7) needles.