How do I check paper size, bleed and printer margins before printing?

Start with three separate measurements

Write down the finished width and height you want, the bleed required around the design, and the printer margin on each paper edge. These are different measurements. Bleed is artwork extending beyond a trim edge; a printer margin is an area the printer cannot reliably print. A white border already inside a design is not automatically bleed. Use the dimensions supplied with your PDF or the intended size of the printable. If you do not know your printer margins, check its settings or documentation and make a test print rather than assuming it prints to every edge.

Worked example: a full A4 design with bleed

An A4 sheet measures 210 by 297 mm. For a finished design of that size, adding 3 mm of bleed on all four sides gives a required rectangle of 216 by 303 mm: add twice the bleed to each dimension. With 5 mm printer margins on every side, the usable area of the same A4 sheet is only 200 by 287 mm: subtract twice the margin. The required rectangle cannot fit. Rotating it does not solve the shortage. On an A3 sheet of 297 by 420 mm with the same margins, the usable rectangle is 287 by 410 mm, so the 216 by 303 mm rectangle fits. That is a dimension comparison; it does not instruct your printer to use A3 or create the missing bleed.

Use the result to choose the next step

Enter those measurements in the WallKiwi bleed and margin checker. Check which orientation fits and compare the result with the real print preview. If neither orientation fits, choose larger paper where your printer supports it, reduce the intended finished size where that is acceptable, or use a file prepared for tiled printing. Do not silently shrink a pack whose pieces must join at a fixed scale. A print shop can have different bleed and file requirements, so use its actual specification for a shop-bound file. Keep the dimensions you entered with the result so you can repeat the check after changing paper or printer.

Print one sheet and measure it

Select the matching paper and orientation, then inspect the print dialog preview. Use actual size or 100% for a PDF that must retain fixed dimensions. Print one page before the whole pack and measure a known feature with a ruler. A piece that is smaller than specified suggests scaling; a missing edge suggests cropping or a printable-area limit. Correct the settings and test again before using more sheets. The practical tool PDF is a record of the calculation, including its assumptions. Its schematic is not a life-size cutting template. For an exported display pack, follow that pack’s assembly guidance as well.

Common questions