I have another baby blanket in the works and just finished two more baby hats. They got big awwwwws at the baby shower today. That made me feel great.
So for the baby blanket I am using baby clouds yarn omg it is going to be so soft and cuddly.
Large gauge - size 13 in needles
Regular gauge - size 10 in needles
Small gauge - size 7-8 in needles
Fine gauge - size 5-6 in needles
extra fine gauge - 1-2 in needles
A lot also depends on what type of stitch you use whether it be the single stitch (e-wrap) or the knit stitch, depending on the gauge you get.
Got this from a post in Ravelry by loomdaze