Free tool
Book trim sizes, to scale.
See a trim size on screen at roughly real size, compare two formats side by side, and drop in a credit card for a real-world sense of scale. In mm and inches.
148 mm · 5.83″210 mm · 8.27″
Shown roughly to scale — exact on-screen size depends on your monitor. Dimensions are listed in mm and inches. Use the credit-card reference for a quick sense of real size. Full specs and recommendations by book type: → Book specs guide
These help you plan. We make the real files.
When it’s time to build the interior, the spine and a print-ready cover, we prepare them precisely to your printer’s spec — with a fixed quote and a delivery date.
Want an exact spine and page count? Send us your manuscript for a fixed quote.