From the pattern:

These booties are easy enough for a beginner… and so quick to knit seasoned stitchers can finish them in an afternoon.

Materials:

Worsted-weight yarn—one skein each or scraps of black, red and white
Pair of size 5 straight knitting needles or size needed to obtain gauge
Size G/6 (4.25mm) crochet hook
Yarn needle or large tapestry needle