I have finished (bar the weaving in ends and blocking) a Noro sock.
It doesn't fit. Well, it does, but it's a squeeze to get it onto my foot. The knitted fabric is also a bit stiff and dense for my liking. I'm wondering if it would have been better on 3mm needles. So do I:
1. Persevere, knitting the second sock to match. Blocking might relax the fabric a bit and make it a little bigger. If not, I give the socks away to someone with slightly smaller feet.
2. Rip and reknit on larger needles. A 64 stitch sock on 3mm needles fits me when I use Colinette Jitterbug. It might work for Noro. (NB, I really should have swatched, shouldn't I? But I tend to treat the toe as a swatch for socks.)
3. Rip and reknit on the same needles, but using 68 or 72 stitches. (72 initially looked too wide, which was why I went down to 64. I wish I'd used 68 instead though).