This pattern is Design #2 in Cleckheaton Book 951, and the Cocoon version was also featured as Design #30 in Knit Simple Magazine Fall 2007.

From the pattern: Ribbing’s natural give gives baby comfortable room to stretch and grow. A couture cutie if ever there was one, this clever shrug is simply a K3, P3 ribbed rectangle with seamed sleeves and a ribbon tie.

Sizes :
Age: Newborn (3, 6, 9 months)
To fit chest: 13.75 (15.75, 17.75, 19.75)“/35 (40, 45, 50)cm
Sleeve length: 3.5 (4.25, 5, 6)”/ 9 (11, 13, 15)cm
Cross back: 9.5 (10.5, 12, 13)”/24 (27, 30, 33)cm
Upper arm: 9.5 (10.25, 11.25, 12)”/24 (26, 28.5, 30.5)cm

Materials:
Cocoon: 2 (2, 3, 3) 50gm balls
or
Merino Bambino: 3 (4, 4, 5) 25gm balls

Also required:
20 (22, 23, 27)”/51 (56, 58.5, 68.5)cm ribbon
Wool needle for sewing seams

The pattern is also available as a free download at DBNY.