The cardigan is worked from the bottom up without seams (only the armhole seams). The body and the sleeves are worked separately, then are joined for the yoke.
This is a botton up raglan technique, but do not be afraid if you`ve never tried it before, the pattern has detailed explanation of every row of the yoke. There are also links to the author's videos of the main pattern and picking up stitches for front bands. There is a detailed description of the every row for Short rows, that are needed for the perfect fit. The dimensions are given in both metric and imperial units.

Gauge in stockinette stitch - 22st x 28r in 10x10 cm (4’’x4’’) square

Size options:
9 -12 mo, 1-2 yrs, 2-3 yrs, 3-4 yrs, 4-5 yrs, 5-6 yrs., 6-7 yrs, 8-9 yrs, 9-10 yrs

Yarn needed (e.g. Sandnes Garn Duo): 4 (4) 5 (5) 6 (6) 7 (7) 8 skeins
Needles: circular needles size 4mm (US 6), 3 mm (US 3), double pointed needles size 4mm (US 6)