I took the larger shirt and cut it down the middle.
Then I cut all the way around the neckline.
Then I chopped off the arms right below the elbow.
Then starting at the bottom hem I cut up the middle at a slight angle until I reached the neckline. Then repeated on the other side.
Next I grabbed my second shirt and cut off the top part right below the arm pits.
Then I cut that piece into three sections.
I took one of the side pieces and attached it to one of the middle pieces. The side piece with the seam will go around the neck. I did this with the other side piece and middle piece as well.
Lining up the hem I pinned the pieces to each side of the shirt. Then I sewed each side stopping about two inches from the end. I did not attach the two side pieces at the collar. Since I wanted to make sure the hems matched up, I sewed these pieces together at the very end. Then I finished attaching it around the neck to create a collar.
Your lightweight t-shirt cardigan is complete.
Wrap it around and pin the side for a more fitted look.