From the Knit Rowan website:
Part of the Rowan Studio 20 collection and now featured as part of the Original Denim Online Collection, this pattern uses Original Denim yarn (cotton) and has been designed exclusively for the web site by Grace Melville.

Finished width dimensions:
46: 51: 57: 63 cm
18: 20: 22½: 25 inches

Yarn Information:
Photographed in Nashville 225
6, 7, 8, 9 skeins
600, 700, 800, 900 yards

Extras:
QTY (3) BN1367 (18mm) buttons from Bedecked

Gauge notes:

• Before washing: 20 stitches and 28 rows to 10cm (4 inches) measured over stockinette stitch using larger needles.
• After washing: 20 stitches and 32 rows to 10cm (4 inches) measured over stockinette stitch using larger needles.