I increased the top three tiers of squares by one stitch. I knitted them with KnitPicks Palette yarn. I didn't need nearly the amount I bought. I have enough leftover to make some interesting gloves or something. And then some. I don't think I would recommend it as sock yarn. It's spun too loose for a sock yarn, in my opinion, and it isn't very soft. It's not marketed as sock yarn, but it's the right weight and it was a bargain. I'm still glad I used it for these. I'll wear them when it's cold out, for sure!
