From the Knit Rowan website:
Knit this women’s slip stitch sweater from Autumn Knits, a design by Marie Wallin using the luxurious yarn Lima (baby alpaca and merino wool). A beautifully colourful slip stitch pattern detail with contrasting ribs and full length set-in sleeves, this knitting pattern is for the experienced knitter.

Finished width dimensions:
42: 47: 53: 59: 66 cm
16.5: 18.5: 21: 23: 26 inches

Yarn Information:
A - M Picchu 885
2, 2, 2, 2, 2 skeins
240, 240, 240, 240, 240 yards

B - Violet 901
1, 1, 1, 1, 1 skein
120, 120, 120, 120, 120 yards

C - Chile 882
1, 1, 1, 1, 1 skein
120, 120, 120, 120, 120 yards

D - Andes 880
5, 5, 6, 6, 7 skeins
600, 600, 720, 720, 840 yards

E - Brazil 895
1, 1, 1, 1, 1 skein
120, 120, 120, 120, 120 yards

F - La Paz 891
1, 1, 1, 1, 1 skein
120, 120, 120, 120, 120 yards

G - Cusco 884
2, 2, 2, 2, 2 skeins
240, 240, 240, 240, 240 yards

H - Guatemala 892
1, 1, 1, 1, 1 skein
120, 120, 120, 120, 120 yards

Gauge notes:

• 20 stitches and 26 rows = 4 inches (10 cm) over stockinette stitch using larger needles.
• 20 stitches and 30.5 rows = 4 inches (10 cm) over design pattern using larger needles.