You will need two different colors of yarn for this pattern.

The sizing for this pattern works as follows:

Small should fit a baby who is wearing NB - 6 month clothing, and the fit should be from about the knee to the ankle, give or take a bit.

Medium should fit a baby who is wearing about 6 - 12 month clothing, and the fit should be from just below the knee to around the ankle.

Large should fit a baby/toddler who is wearing 12-18 month clothing, and the fit should be a little short of knee to ankle length.