From the Knit Rowan website:

This pattern is designed by Lisa Richardson and features a jumper and a beret, both using the eye-catching diamond colour work. The jumper, completed in Felted Tweed, uses intarsia techniques for the stunning striped colour work. The beret uses Felted Tweed Aran and can be used for a much more subtle effect using neutral shades for an accessory that will add style to any outfit.

Finished chest width dimensions
60.5: 66: 71.5: 78.5: 85 cm
24: 26: 28: 31: 33½ inches

Yarn information
Photographed in Rowan Felted Tweed DK
*** Yarn is used DOUBLE throughout. ***
A - Seasalter 178
2, 2, 2, 3, 3 skeins
382, 382, 382, 573, 573 yards

B - Stone 190
5, 5, 6, 6, 6 skeins
955, 955, 1146, 1146, 1146 yards

C - Bilberry 151
4, 4, 4, 5, 5 skeins
764, 764, 764, 955, 955 yards

D - Delft 194
3, 3, 3, 3, 3 skeins
573, 573, 573, 573, 573 yards

E - Avocado 161
2, 2, 2, 3, 3 skeins
382, 382, 382, 573, 573 yards

F - Rage 150
2, 2, 3, 3, 3 skeins
382, 382, 573, 573, 573 yards

G - Mineral 181
2, 2, 2, 2, 2 skeins
382, 382, 382, 382, 382 yards