A correct file can still print at the wrong size when the application and driver make hidden choices.
SCRAPBUJOA measured template may shrink to the printable area without an obvious warning.
Full bleed can enlarge the image slightly and trim important border details.
The preview may scale for Letter while 12×12 or A4 media is actually loaded.
Application settings and printer-driver settings can both affect the same print.
Measure one known element before cutting or assembling the final project.
Open the source-backed ScrapBujo guide for the full workflow, official resources and printable examples.