Needle and yarn information from website: “Earrings are knit with my 4” size #0000 needles (1.25 mm) Variation: The earring pattern also works up beautifully with any size yarn and needles. To knit an easy, larger mini sock pin or ornament, use sport weight yarn and #3 (3mm) DP needles, or worsted weight and #8 (5mm). This is a great way to try out the pattern before you knit earrings. ”