But first, I'll show you the fabrics I'm using for the new quilt. There is a dark green, medium green, medium beige, and light beige.
Got all the squares cut.
I draw a line diagonally from corner to corner on the lightest of the two 5" squares. In this case, it's the medium-green.
Put the 2 squares right-sides-together. Stitch a scant 1/4" from the line on both sides of the line. This means just slightly less than a 1/4" seam allowance.
Cut on the drawn line.
Now trim each HST square to a perfect 4 1/2" x 4 1/2".
An that's how I make HST squares that come out the exact size I need......most of the time :)