I guess precision is not my strong point. It took me three tries to get it right. The first one came out 9 1/4 inches, the second one came out 9 inches - I corrected by 1/4 inch, but the wrong way! Humph. :>} The third time I went with Plan B and made a small star with a border to make it come out the required 9 1/2 inches. I like it! This is the Ohio Star pattern, which I am quite fond of, since I live in Ohio. The assignment was to make any star out of batik on any black background, creating a 9 1/2 inch block. I doubt if anyone else had to do it three times!