From the Knit Rowan website:
Knit this ladies open, draping front jacket, the member’s exclusive pattern for March 2015. Designed by Lisa Richardson using the exquisite yarn cSilkystones (silk and linen), this garter stitch jacket has an eye catching ladder stitch panel down the centre of the back.

Finished dimensions:
45.5: 50.5: 56.5: 62.5: 69.5 cm
18: 20: 22: 24½: 27½ inches

Yarn information:
Photographed in Dell 088
12, 13, 13, 14, 15 skeins
1308, 1417, 1417, 1526, 1635 yards