The layers for each book size are grouped together on the same base. Scor lines are included as guides for adhering to the layering diecut pieces and/or for adding more detail using the layering stencil. Use them vertically for a bookshelf look, or stack them horizontally for a desktop look. Approximate Sizes: Largest Book: 7/8"w x 3 1/5"h Thinnest Book: 7/16"w x 3"h Shortest Book: 1/2"w x 2 1/16"h