After sewing a 4 patch, I had my husband cut a 3 1/4' sq. out of glass. I marked in 3/4' from the left corners and then with permanent fine point marker, crossing them in the middle. Then match the seam where they cross and trim off all the corners. FEELS SO GOOD TO BE THROWING OUT SO MUCH MATERIAL THAT IS SO SMALL THAT I CAN'T DO ANYTHING WITH IT. Turn glass over to get a different look. I love that my 2 1/2' squares are finnally getting a new look