Paper piecing is an old method of quilt making which is still used today. The cut paper piece is the finished size. You add the seam allowance as you cut the fabric, using the paper as a guide.
The longest side is 2 inches. They are just shy of 2.5 inches from tip to what would be the center of the dresden plate.
Package of 50 pieces
I personally use this for applique and paper piecing. The second picture shows the block I’ve been working on with one of these sets.