1. Square: Add ½” to the height and length of the finished size.
2. Half-square Triangle: Add 7/8” to the height and length of the finished size of the square made from sewing two half-square triangles together. Cut square in half, diagonally to create two half-square triangles.
Quarter-square Triangle: Add 1 ¼” to the finished size of the longest side of the quarter-square triangle.
To figure the finished diagonal measurement of a block, multiply the finished size by 1.41.
5. Multiply the finished length of a diamond patch by 3.41 to find the finished block size for an 8 pointed star.