From the description:

SIZE: Garments are designed to fit newborn to 3 months; afghan measures approx 36” square.

For Jacket, Bonnet, Booties and Mittens:

Baby yarn: 4 oz.
Size 2, 7” double pointed needles
Size 4, 7” double pointed needles and 10” straight knitting needles
Gauge: With baby yarn and size 4 needles in stock st, 7 sts = 1”
Satin Ribbon: 3 yds, 1/4” width; 1 1/4 yds, 3/4 width

For Afghan:

Knitting Worsted: 14 oz.
Size 9, 29” circular knitting needle
With worsted weight yarn and size 9 needle in Ripple Lace Patt, 20 sts = 4 3/4”