I remember my next-door neighbor knitting these as her first knitting project for Girl Scouts.
Let’s see… Uses knitting worsted and size 5 needles, I believe.
CO enough stitches to cover the width of the foot in garter st - then multiply this number by 3. [Sorry, I forget how many]
Row 1: Knit 1/3 way through, purl 1. Knit 2/3 way through, purl 1. Knit to end.
Row 2: Knit. This is the right side. The 2 purled stitches should fall on either side of your foot.
When the sock is about 1/2 as long as the foot, switch to K1, P1 ribbing. Work the ribbing until about 1" short of the foot [this allows for stretching] then thread a double-strand of yarn through all the sts. Pull tight and tie off.
Sew the ribbing portion together, leaving the garter-st. part open.
PS - If you need me to be more specific, just let me know and I’ll knit one up.