From the Knit Rowan website:
Knit this children’s striped sweater, a free pattern to download as part of the Pure Wool Worsted Children’s Online Collection. Designed by Susan Mills using our wonderfully soft machine washable worsted weight yarn, Pure Wool Worsted (wool), this sweater is suitable for little boys and girls and is available in either a striped or colourblock version.

Finished width dimensions:
28.5: 33.5: 38: 43 cm
11.5: 13.25: 15: 17 inches

Yarn Information:
Colorblock version (shown on boy)
A - Electric 143
1, 1, 2, 2 skeins
219, 219, 438, 438 yards

B - Crimson 123
1, 2, 2, 2 skeins
219, 438, 438, 438 yards

C - Damson 150
1, 2, 2, 2 skeins
219, 438, 438, 438 yards

Striped sleeve version (shown on girl)
A - Magenta 119
2, 3, 3, 4 skeins
438, 657, 657, 876 yards

B - Periwinkle 146
1, 1, 1, 1 skein
219, 219, 219, 219 yards

C - Rosy 115
1, 1, 1, 1 skein
219, 219, 219, 219 yards

D - Azure 138
1, 1, 1, 1 skein
219, 219, 219, 219 yards

E - Morello 121
1, 1, 1, 1 skein
219, 219, 219, 219 yards

F - Mustard 131
1, 1, 1, 1 skein
219, 219, 219, 219 yards