1/4" spine holds roughly 20 pages of regular printer paper
When making a cardboard cover: after you make the two inner creases, turn it over, figure out which is the front, make an outside crease 1/2" from the front cover crease
Dimensions for cardboard (pizza box) book: 11 1/4" wide by 8 3/4" tall
20 pages of paper 8" tall and 5 1/4" wide
Cover image: 4" wide, up to 7 3/4" tall
