This is my goto toe-up sock pattern for keeping small feet warm. I knit them one or more pairs at a time on one 80cm circular needle (magic-loop).
Size: 12-24 months (elastic and flexible fit)
Yarn: Dalegarn baby ull (superwash fingering wool), about 25g / 80-100m
Abbreviations: m1 = pick up and knit yarn from previous round tbl
Toe: Start with a 12-stitch Turkish cast-on, and then increase to 40 stitches (all in stockinette).
Foot: Work stockinette on sole needle and p1 (k2, p2)* k1 on instep needle until work measures 6-7cm.
Gusset: Increase at the beginning and end of the sole needle as follows:
Row 1: k1, m1 , knit until 1 stitch remains, m1, k1 – knit across instep in ribbing pattern.
Row 2: Work stockinette on sole needle and ribbing on instep needle.
Repeat rows 1 and 2 for a total of 6 times (52 sts).
Turn heel: On sole needle, work short-rows back and forth 3 times with 4 center stitches:
K22, kfb, k1, wrap and turn
P15, pfb, p1, wrap and turn
K13, kfb, k1, wrap and turn
P11, pfb, p1, wrap and turn
K9, kfb, k1, wrap and turn
P7, pfb, p1, wrap and turn
Knit across heel, knitting the wrapped stitches. Knit across instep needle in ribbing.
Heel flap: Knit across heel (knitting the wrapped stitches) until 10 stitches remain. Decrease back to 20 stitches as follows:
row1 (RS) ssk, turn
row2 (WS) sl1, p18, p2tog, turn
row3 (RS) sl1, k1 to 1 stitch before gap, ssk, turn
row4 (WS) sl1, p to 1 stitch before gap, p2tog, turn
Repeat rows 3 and 4 until you reach the end of the RS row (21 stitches remain)
Work across instep needle in ribbing. k2tog first 2 stitches on sole needle (completing the decreases) and knit across sole needle (40 sts).
Leg: work p1 (k2 p2)* k1 on both needles until desired length (about 7,5cm). Bind off loosely.
Finishing: Weave in ends.