Step 3: Sew Side and Underarm Seams
Fold the piece in half so that in now rests in the shape of a sweater. Make sure you have the wrong side facing out for sewing otherwise you’ll end up with a visible seam. Sew up the side of the sweater and across the length of the underarm seam. Repeat on the other side.
Turn sweater right side out for the next step.