From the Knit Rowan website:
Knit this Womans Short sleeved stocking stitch jumper from Rowan Loves.A design by Sarah Hatton using either the gorgeous Kidsilk Haze or the beautiful Felted Tweed,with a ribbed crew neck and deep ribbed sleeve cuffs. This is for the beginner knitter.

Finished chest width measurements:
49: 54: 60: 66: 73 cm
19.5: 21.5: 23.5: 26: 28.5 inches

Yarn information:
Photographed in Felted Tweed DK colorway Duck Egg 173
6, 6, 7, 8, 9 skeins
1146, 1146, 1337, 1528, 1719 yards

Photographed in Kidsilk Haze colorways Majestic 589 and Cream 634, one of each held together throughout; otherwise, yarn held DOUBLE if in a single colorway
9, 10, 11, 13, 14 skeins
2061, 2290, 2519, 2977, 3206 yards

Kidsilk Haze held SINGLE
4, 4, 5, 6, 6 skeins
916, 916, 1145, 1374, 1374 yards