2 strands

German twisted CO for smallest size

Collar: On every row - slip 1st stitch p-wise wyib, purl last stitch
35 rows
Buttonholes on row 8, 18, 28

Added some short rows (back is 6 rows higher than front)
Inc to 74sts for front/back and 52 for sleeves.

CO 4 extra sts for each armhole (74+74+4+4=156sts total for body)

Garter hem (3mm) dec 10sts -> 146sts, 8 garter ridges, stretchy BO knitwise after the last purl round

Sleeves 52sts + 6 sts (PU 4sts from CO + 2 extra stitches to avoid holes)
Dec those 6 extra sts on fol 6 rounds -> sleeve=52sts
Dec 2 after 4th white stripe, dec 2 after last stripe ->48sts
Garter cuffs (on 3mm needle),
Dec 4sts on first purl round ->44sts
8 ridges, stretchy BO knitwise after last purl round

FO 160g (143g Harbour + 17g Dove)

Love the yarn, it´s soft and knits up evenly, 2 threads work great for this project.