Turned pattern into sweater with button placket and different gauge, basically just using measurements of the striped cardi I made from the pattern.

On the number of stripes: https://www.terredemarins.fr/blog/tendances/430-la-verita...

Body
W/ 3.5mm co 112sts, 2x2 rib for 10r (start p1).
Switch to 4mm, cont. straight, purl last st of round to hide colour changes: 2r green, 1r purple, 2, 1, 2, 1, …
15 purple stripes + 2 more green rounds.

Sleeves
Co 32sts, 7r ribbing, 6r straight (same striping sequence as body, purl st to hide colour changes).
Start inc ev 3rd row 5x, ev 6th row 4x, 9x total, 50sts, 14 purple stripes. Stop right after last increase.

Yoke
Put everything on one needle, 4 underarm sts each side to be sown (46-52-46-52 / 196 total). First round is a purple round. Jogless stripes. 21 purple rounds in total for body (20 for sleeves).
14 dec rounds in total (84sts).
Continue jogless stripes 2-3 rounds after last purple round to hide. Start opening for button placket on round after.
For neckline ribbing dec ev 5sts except for one inc in center on each front and back: 84 > 72 (-12).
7r of ribbing.

Button placket
Co 14sts, p2, k2. 3 button holes in rev st columns, 2nd row. Bo in r5.

Purple: 24.7gr
Green: 79.4gr

Width: 23.5cm, length underarm: 18cm, length arm underarm: 16cm