Originally Posted by bearisgray
Maybe this drawing will make it clearer?
The length should always be at least 18 inches.
Not all fabrics are 45 inches wide - some are as narrow as only 40 inches - so the width of the FQ will only be half of the width of the fabric - so may vary from 20 to 22.5 inches.
AWESOME! Thanks for taking the time to do the visual!