From the Knit Rowan website:
Knit this childrens round neck sweater, a design from the Rowan archive that is now available to purchase online. Designed by Marie Wallin, we would suggest using our beautiful soft matte cotton yarn Summerlite 4ply (cotton), this pretty design has an all over lace pattern and has a three button shoulder opening making it easier to slip on and off.

Finished dimensions:
25: 26: 27: 28: 29: 30: 31: 32 cm
10: 10: 10½: 11: 11½: 12: 12: 12½ inches

Yarn information:
Photographed in Summerlite 4Ply
3, 3, 4, 4, 4, 4, 5, 5 skeins
573, 573, 764, 764, 764, 764, 955, 955 yards

Extras:
QTY (3) BN1366 (11mm) buttons from Bedecked

Gauge notes:
The updated pattern that is available for download requires 3mm needles