Summary Two versions - worsted weight (Cascade 220) and fingering weight (Regia), Top-down, 5 double-pointed needles.

From Knit Socks! page 86:
“Reveal a different side of your personality with lace socks that are simple to knit and fun to wear. This easy pattern knits up quickly and makes a stretchy sock that fits a variety of foot lengths - perfect for gift giving! Knit them in worsted or fingering-weight yarns. For a less flamboyant look, use the sock yarn for the top ribbing instead of novelty yarn.”

Note Fingering weight version uses US #1 (2.25 mm) needles and a smaller gauge.