The sweater is sealmess, top down and features circular yoke.

The yarn I used for this pattern is Fårö Tunn Gotlandsull, lovely Gotland wool, 100 g/300 m (available here). If you want to use another yarn, please note that despite of the yardage this wool tends to “swell” after washing and blocking, so would need a heavier yarn.
Gauge: 16 sts x 28 rows = 10 cm x 10 cm in stockinette on 4.5 mm needles in circular knitting.
Notions: I recommend several pairs of circular needles in order to be able to try on as you work. For neck opening ribbing and sleeves use either double pointed needles or short circular needles (40 mm); stitch markers