I'm going by Eddie's except I'm hand stitching the bias 'flap'. It's very easy. Somewhat time consuming, but I enjoy doing it so it doesn't matter. I've barely started with just 2 rows finished. I am using his measurements of 8.75" per square and 2.25" for the 'glass'. It will be slightly oversized for a queen bed. I make 24 squares across and will probably also do 24 squares top to bottom.