My camera is currently out of commission, so this blog post is a bit later than planned and illustrated!
Before you cast on the underarm stitches, your cardigan doesn’t look a whole lot like a cardigan if you lay it out flat, but that’s going to change here. You’re going to knit across the left front, CO stitches, knit across the back, CO stitches, and then knit across the right front using all one ball of yarn. I tend to use the back loop cast-on method here because it adds the least bulk, but the knitted cast-on or cabled cast-on methods would both get the job done.
That joins together all of the different sections, and you’re ready to knit down for the waist shaping. The waist shaping is pretty straight forward and always seems to go by faster than I expect.
A note on the armholes, between the natural curl of stockinette and complete lack of structure there, your armholes are going to look pretty big at this point. If you’re matching the pattern gauge and the measurements on the schematic suit your taste, there’s no need to worry about how big they might look before the sleeve is added. I know they can be a bit worrisome looking if you’re new to set-in sleeves, but just trust the pattern and you’ll be fine.