Gauge: 21 sts in 4 in / 10cm in stockinette stitch (row gauge is not important – measurements are given instead of row count).

You will need: DK yarn for the main/outer part and for lining/inner part (for each: up to 80 grams for the smallest size, up to 190 grams for the largest size), knitting needles to obtain the gauge (for knitting in the round), two stitch markers, darning needle, a stitch marker, a locking stitch marker. Optional: pins or clips, crochet hook in the same mm size as your gauge needles.
Small amount (up to 15 grams) of yarn for the face opening binding.