I pieced together a couple patterns and modified them both so much that idk if I can say I used either.

But I started with the Terrazzo Sweater by PetiteKnit for the basic construction. However I wanted the arm depth to be much larger so I did many more rows of increases for just the sleeves, while not working any for the body. And I did regular 1x1 rib

Then I did the collar off of the collar in Sweater No.26 by MFTK.