From the Knit Rowan website:
Knit this womens slip stitch sweater, from Simple Shapes Lima a design by Lisa Richardson, using luxurious Lima (baby alpaca and merino wool). With raglan sleeves and a boat neck, this knitting pattern is for the intermediate knitter.

Finished chest width dimensions:
46 51: 56.5: 63.5: 70 cm
18: 20: 22: 25: 27½ inches

Yarn Information:
A - Chile 882
5, 5, 5, 6, 7 skeins
600, 600, 600, 720, 840 yards

B - Argentina 893
3, 3, 4, 4, 4 skeins
360, 360, 480, 480, 480 yards

C - Damask 899
3, 3, 4, 4, 4 skeins
360, 360, 480, 480, 480 yards