I'm having trouble coming up with a size. When I get something for the width I get something ridiculous for the length, or so it seems. Like if I go for 12" blocks, I get 84" x 108". If I'm going by the approx. quilt sizes ccbear66 posted, that means I haven't even hit the minimum width and hit the maximum length. And this is without the 12" drop I want to add.