From Knitting Magazine:

Teach yourself the magic of slip-stitch knitting today with this cute and flattering little jumper

Additional tension
22 sts and 26 rows over slip stitch rib, using larger needles

Yarn
Main colour: 924 / 1056 / 1056 / 1056 / 1088 / 1088 / 1320 / 1320 m
Contrast colour: 396 / 396 / 396 / 396 / 396 / 528 / 528 / 528 m
These yardages are derived from the discontinued Artesano Aran.