The "snakes" on these socks aren't poisonous, and they wouldn't dream of hurting you.They are actually very obedient and fall into place nicely as you knit. Use a light-colored yarn to highlight the textured pattern.Suggested materials include 1/fine yarn and 2 size 2 US (2.75mm) circular needles (or one long circular needle). Fits sizes small (7 1/2"), medium (8"), and large (8 1/2").