Additional Gauge Info:

fingering weight (small preemie):
US C/D crochet hook
yarn:
white - 1/2 ounce
yellow - a few yards
blue - a few yards
gauge: 11 dc = 5 cm (2”)

DK weight (medium/large preemie):
US E/F crochet hook
yarn:
white - 1/2 ounce
yellow - a few yards
blue - a few yards
gauge: 9 dc = 5 cm (2”)

worsted weight (newborn):
US F/G crochet hook
yarn:
white - 1/2 ounce
yellow - a few yards
blue - a few yards
gauge: 6.5 dc = 5 cm (2”)

Direct pdf link: http://www.p2designs.com/pdfs/ForgetSox.pdf