Yarn Substitution question--baby socks

So, I was out at a new LYS today with my MIL, and I picked up a teeny skein of Lorna’s Laces [I]Angel[/I]. If you haven’t touched this yarn, well, don’t, because you WILL buy it. It was wound in these teeny tiny skeins of 50 yards each, and it’s 70/30 Angora/Lambswool, and totally addictive. She had it in a little basket RIGHT next to the register, so to influence the impulse buy, but at $16 a skein, it’s not cheap. It is, however, just enough to make a pair of baby socks.

now the question is, what pattern? I was thinking the North Country Cotton pattern, but I’m wondering what size needle to use, and i don’t want to swatch too much because I don’t want to fuzz out the yarn (it’s very fluffy). Is North Country Cotton a light worsted? Does anyone have a skein they can give me a wpi on, for comparison?

today is your lucky day! I was just adding my north country cotton to my stash… my label says 5 st per inch on size 6 needles. I’m getting between 10 and 11 wpi. HTH!

That’s hugely helpful! Thanks so much!