This top is made by making a sleeve in the round, switching to knitting straight for the left side collar, then mirrored for the right side. The pieces are grafted together, then the stitches on the bottom are picked up, and you’ll knit the torso in the round from that. I am sorry I only have one size, if you modify it to a different size, please let me know and I can include it (and credit you).
Enjoy!