Additional Gauge Information:

fingering weight (small preemie):
US C/D crochet hook
yarn: white - 2 1/4 oz, yellow - a few yards, blue - 1/2 ounce
gauge: 11 dc = 5 cm (2”)

DK weight (medium/large preemie):
US E/F crochet hook
yarn: white - 2 1/4 oz, yellow - a few yards, blue - 1/2 ounce
gauge: 9 dc = 5 cm (2”)

worsted weight (newborn):
US F/G crochet hook
yarn: white - 2 1/4 oz, yellow - a few yards, blue - 1/2 oz
gauge: 6.5 dc = 5 cm (2”)

all sizes: three 1/2” - 3/4” buttons