Needle: 3.75mm and 7mm, circular needle, or size to obtain gauge.
Gauge: 22 stitches and 20 rows = 10cm in ribbing/3.75mm needle. 11.5 stitches and 18 rows =10cm in stockinette in the round/7mm needle. Measurements taken after blocking - the ribbing and the body will relax and stretch a bit.
Please note, Feather yarn has been discontinued. As an alternative you can use two strands of Kidsilk, or just omit the Feather entirely and use only one strand of Kidsilk. This will not affect the gauge and you can knit the pattern as written.