From the Knit Rowan website:
Knit this women’s textured sweater from Alpaca Colour, a design by Lisa Richardson using the delectable yarn Alpaca Colour (baby alpaca). With a simple yet effective textured stitch pattern, round neck and full length set-in sleeves, this knitting pattern is for the beginner knitter.

Finished width dimensions:
45.5: 50: 56.5: 62: 69 cm
18: 19.5: 22: 24.5: 27 inches

Yarn Information:
Photographed in Blue John 140
10, 11, 12, 13, 15 skeins
1310, 1441, 1572, 1703, 1965 yards