This pattern can be made with any yarn as i-cord with appropriate needles, so there is no specified yarn, needles, gauge, or yardage as those will vary depending on the yarn chosen.
The quantity used is very small, so it’s great for stash busting!

Though there are two sizes in the pattern, the size is strongly determined by the chosen yarn. The two versions allow the knitter to work mostly as 3 stitches or 4 stitches i-cord, depending on their preference.