I have a few variations in mind... watch this space over the next month or so. I'll also compile all the size variations into one post, so it's a bit easier to read.
In the meantime...
Basic Ribbed Sock Sized for Men
Refer to basic pattern here. Notes on resizing for women here.
Cast on 64 sts for a smaller man's foot, 68 sts for a larger man's foot.
Work 8 ins/20 cm for leg.
Work heel on first 31 (35) sts of round. Work 23 (25) heel rows.
Work the heel turn as follows:
RS: K21 (23) , skp, turn.
WS: P11, p2tog, turn.
RS: K11, skp, turn.
and repeat the last two rows to turn the heel. You’ll have 13 left over, and pick up 16 (17) sts for the gusset. Then decrease the gusset down to 64 (68) sts for the foot.
And of course, lengthen the foot to suit – toe decreases start 5cm/2 ins short of your foot length.(For those who are doing the math, the only really tricky bit is making sure that the ribbing lines up nicely on the foot. That is, you want to work the heel sts on the first 4x+3 sts so that the heel sts start and end with three knit sts, and there's a purl st running down each side of the instep sts.)