I tend to think of this as a traditional method but there are several others that can wear that hat as you will see.
Square in a square quilt block sizes.
Cut 2 squares cut in half on diagonal.
Cut the center square fabric equal to the finished block size plus 1 2 for seam allowances.
Choose the finished size for your square in a square quilt block or unit.
For example if the finished size of your block unit is 4.
Pin one smaller square on each corner of a larger square with the right sides together.
Now you will cut squares of fabric to make the 4 corner triangles of the square in a square block.
Because the easy ngle works in 1 2 inch increments some of the sizes are used twice as the sizes increase.
For square in a square units remember.
Triangles on the square.
Cut four corner patch fabrics equal to the finished size of the block divided by 2 and add 1 2 for seam allowances.
Cut 1 from freezer paper.
Thus for a 6 finished block your corner squares will be cut 3 5 inches.
It is the part that will be the center square in the finished square in a square block.
2 2 2 1 3 8 3 3 2 2 1 8 4 4 3 2 5 5 3 3 6 6 4 4 8 8 1 2 5 5 5 8.
The corner triangles sizes below are larger than they should be so you can square them down.
Cut off the excess outside fabric and open up the squares to reveal the finished block plus seam allowance of 1 4 inch all around.