Princess seams are usually done on a mannequin, but I don't have one.
Therefore, I figured out how to make a pattern for princess seams out of a t-shirt for myself :D
Step 2: Pinning
Pin where you want the seams to go-- be careful not to pin yourself!
Step 3: Marking
they 1/4 inch room you leave is for seam allowance.
unpin the shirt and take it off.
Step 4: Cutting
also, cut along the side shoulder, and arm seams of the shirt.
*note: to make the right and left sides equal, i cut out the right side and flipped it over to create the left side.
Your pieces should look something like this.