Guide

Printing worksheets at true size

Try a small experiment. It costs one sheet of paper. Print a tracing page, then hold yesterday's name card up against it. If the letters do not match, your printer has been quietly shrinking every worksheet you own. It is the most common printing problem in classrooms. It has exactly one usual cause, and it takes about a minute to prove and fix.

The cause: "fit to page" means "shrink to fit"

Printers cannot print to the edge of the sheet, so every printer has an unprintable border. Print software, trying to be helpful, notices when a document uses the full page and offers to fit it inside the printable area instead. Fitting is shrinking - typically to 94 or 96 percent - applied silently, to every page, every time. Four to six percent sounds trivial until it lands on precision work: a tracing letter that a child learned at one size arrives smaller; a 5 mm graph grid becomes 4.7 mm and no longer agrees with the ruler in the same lesson; the dashed midline on primary paper drifts from where the child's hand expects it. Nothing looks wrong. Everything is slightly wrong, which is worse than obviously wrong, because nobody thinks to measure.

The fix: Actual size, or 100 percent

In the print dialog, look for the scaling section. It wears different labels in different programs - "Actual size", "Scale: 100%", "No scaling" - and the thing to avoid wears just as many: "Fit to page", "Fit to printable area", "Shrink oversized pages". Choose actual size and the printer keeps the page exactly as drawn, accepting the white margin that an honestly designed worksheet already includes. That is the whole fix. There is no driver to update and nothing to buy.

Prove it with one page and a ruler

Settings dialogs are easy to misread, so do not trust one - measure. Our print size check page prints two boxes of known size (80 mm and 3 inches) plus ruler strips in centimetres and inches. Print it, lay a real ruler on the boxes, and read the verdict yourself. If both boxes measure exact, that printer is honest and every worksheet from it will be too. If a box measures small, you have found the shrink; print the check page again at Actual size and watch it come right. Run the check once per printer - classroom, library, home - because the setting belongs to each printer's dialog, not to the file.

Two habits that keep size honest

First, be suspicious of any PDF that was photographed, scanned or passed through a "compress" tool; those steps can rescale a page before your printer ever sees it. Worksheets generated as true PDFs, at size, stay true. Second, when a colleague shares a printable, print one copy and measure something on it before running 28 - thirty seconds of checking beats a class set of almost-right. True size is a small, unglamorous virtue. It is also the difference between materials that agree with each other and materials that quietly contradict, lesson after lesson.