This Ravelry entry is for both solid color and 2-color striped cardigan versions.

Easy Garter Stitch Cardigans
Anyone from beginner to experienced can make this precious cardigan. Sizes 3-18 mos (16-19”/40.5-48 cm chest). Shown in Patons Beehive Baby Sport 9420 Precious Pink. 4 mm (U.S. 6) knitting needles. (Patons Yarns)

Easy Two Color Garter Stitch Cardigan
The striped version of this super-cute and easy cardigan. Sizes 3-12 months (16-18/40.5-45.5 cm chest). Shown in Patons Beehive Baby Sport 9420 Precious Pink & 9005 Angel White. 4 mm (U.S. 6) knitting needles. (Patons Yarns)

Materials (corrected per errata)
SIZES 3 6 12

SOLID VERSION
09420 (Precious Pink)
2 2 2 balls

STRIPED VERSION
Main Color (MC)
(09420 Precious Pink) 1 1 1 ball
Contrast A (09005 Angel White) 1 1 1 ball