Jumper is knitting top down from the yoke to the end of the body, then you are knitting sleeves and finish edges with rib 22 on the body and i-cord on the neck and sleeves.
You can use formula in the text of pattern to calculate your own size of jumper and all measurements.

Circular yoke pattern include 3 belts. Between belts you are knitting rows with one background color using regular stockinette stitch (front loops).

Yarn in the original model: Italian camel tweed 400 m per 100 g. dark blue + socks yarn Alize Superwash/Alize Artisan 400 m per 100 g in blue, beige, chocolate shades.

Knitting needles in the original model:
3.5 mm per jacquard - lines 40 cm, 60 cm, 80 cm.
3.0 mm on the body of the sweater - fishing line 80 cm, 40 cm.

I highly recommend stocking up on markers that separate the beginning and end (borders) of each wedge of the ornament. Otherwise, there is a big risk of getting confused in the pattern.

In my model of jumper, all 3 belts were knitted with one fabric, but I hightly recommend to divide the fabric into sleeves and body before the third belt. To do this, the number of loops allocated to the sleeves and to the body should be a multiple of 24-25 loops.
Total length of the yoke in my jumper is 29 cm.