Dimensions matter more than the name
Names such as Digest, Trade or Crown are convenient, but what they measure shifts by a fraction of an inch between publishers and printers. So the common sizes are offered as a reference table and a quick-fill menu, and you can always type the exact size your printer uses. Enter the dimensions you actually plan to print, and the ratio, the area and the yield per parent sheet come back.
How it is calculated
The aspect ratio is the long side divided by the short side, shown alongside its gap from the ISO A series at 1 to 1.414 and the golden ratio at 1 to 1.618. Yield lays pieces out on a grid at trim size plus the allowance on all sides and rounds down; shared trim between neighboring pieces is not assumed. Current as of October 2026.
Limits and disclaimer
The size table is a reference, not a recommendation. Gripper allowance, press margins, folding direction and grain are not modeled. The tool does not declare one trim size better than another, so confirm the imposition and paper order with your printer.
Frequently Asked Questions
Yes. The ‘Load a common trim size’ menu and the table at the top hold the usual US sizes, such as 5 × 8, digest, 6 × 9, and 8.5 × 11, and picking one fills in the inputs. The same name can still vary slightly between printers, so adjust to your printer's spec. Once a size is entered, it returns ratio, area and yield.
Proportion is what you notice first when choosing a trim size. For reference, the ISO A series is 1 to 1.414 and the golden ratio is 1 to 1.618, and the gap to both is shown.
Yield is only one part of paper cost. Binding, shelf presentation and reader expectations matter too, so this tool does not declare one trim size better than another.