This is my goto top-down sock pattern for keeping small feet warm. Or maybe more an outline than a full-blown pattern. I knit them one or more pairs at a time on one 80cm circular needle (magic-loop).
Size: 18-24 months (elastic and flexible fit)
Yarn: Dalegarn baby ull (superwash fingering wool)
Cuff + leg: Cast on 42 sts, join in the round, and work p1, k1 tbl ribbing for 7.5cm.
Heel: Work short-row heel in stockinette over half the stitches (21): Work 14 decrease rows (decrease untill 7 stitches remain in the middle), and then work 14 increase rows.
Foot: Continue in ribbing on the instep needle and work stockinette on the sole needle for ca 7.5 cm (untill the foot measures ca 10 cm).
Toe: Decrease row = (k1, ssk, knit to 3 sts remain, k2tog, k1) twice. Work toe decreases every other row 3 times, and then every row 4 times (until 7 sts remain on each needle). Kitchener remaining stitches.
Finishing: Weave in ends.