Pattern calls for 1 ball of Moss and one ball of Black.

From the notes:

“I worked these up as a quick birthday present for my next-door neighbor, who just turned 13 and was about to attend her first Avril Lavigne concert, so I though she could use some armwarmers - especially a pair that matched her new Converse high-tops.

I knit these in the round using the Magic Loop (you could also use 2 circs or DPNs), and it took about half a skein of each color. Also, I have VERY small wrists and hands, so you might want to cast on 4-8 more stitches and add a few rows after the thumbhole if your hands aren’t baby-sized like mine.“