Knitted cuff down.

Cuff: used Sock 4 yarn.

Crocheted CO 68 sts on 2.5 mm needles.
7 rows st. sts.
High back cuff:
4 short rows: 2 sts, 1double st., 1 st, 3 double sts.
2 rounds st. sts..
1 round on 3.5 mm needle.
1 round on 2.5 mm then short rows as before. 7+2 rounds st. sts.
3 needles to 1 knitting for the cuff.

Continued with Austemann Step.
Gusset:
1 round st. sts, then 4 inc every second row.

Heel on 34 +6 = 40 sts.
Knitted for the first time short rows with YO .
Complicated but look nice.