Photo on left is a size 4 ladies and on right size 9 ladies and the socks fits both.
Spiral tube socks were often knit during the war for soldiers as they have no heel so fit a variety of feet sizes. The purpose of the spiral toe is to allow the sock to be worn in any position. They also wear evenly as the heel can be rotated. The stretchy nature of the spiral pattern makes for a nice fit.
My sock starts with a spiral toe, then is worked in a spiral stitch pattern for the foot and leg and finished with a rib cuff.
Materials: 4ply sock yarn
Needles: set of 4 x 2.75mm, 20cm double pointed needles
Using a figure 8 cast on cast on 10sts on 2 of the 4 needles
k = Knit, Kfb = Knit into the front and back of stitch p = Purl
Round 1 k (10sts)
Round 2 *k1, kfb repeat (15)
Round 3 k ( dividing stitches onto 3 needles, 5 sts on each)
Round 4 * k2,kfb repeat (20)
Round 5 & 6 Knit
Round 7 *k3, kfb, repeat (25)
Round 8 & 9 Knit
Round 10 *k4, kfb, repeat (30)
Round 11 & 12 Knit
Round 13 *k5, kfb, repeat (35)
Round 14, 15,16 Knit
Round 17 *k6, kfb, repeat (40)
Round 18, 19,20 Knit
Round 21 *k7, kfb, repeat (45)
Round 22,23,24 Knit
Round 25 *k8, kfb, repeat (50)
Round 26, 27, 28 Knit
Round 29 *k9, kfb, repeat (55)
Work in a spiral *k3,p1 repeat until sock measures desired length.
Increase one stitch in final round of pattern (56)
Work in K2,p2 rib for 5cms
Cast off with a stretchy bind off.
My tutorial for a figure 8 cast on is on YouTube
I will write up the pattern for an 8 ply version in the near future.