Physical size and pixel size are different
Millimeters and inches describe a print. Pixels describe a digital image. To plan a print, multiply its width in inches by the intended pixels per inch. A 2 × 2 inch photograph at 300 PPI needs 600 × 600 pixels. A 35 × 45 mm photograph at the same density rounds to approximately 413 × 531 pixels. Rounding creates tiny differences.
Print settings control the final measurement
A browser-exported file may contain a default resolution tag rather than the intended print density. DigitalDock BD’s presets set pixel dimensions, not a guaranteed DPI metadata value. In the print dialog or layout software, specify the physical size and disable automatic fit-to-page scaling. Measure a test print with a ruler before relying on it for an application.
A correct rectangle does not certify a passport photo
Authorities can require particular head proportions, eye positions, expressions, lighting and backgrounds. Some restrict digital alterations. A resizer does not verify those conditions or approve a document photo. Read the current requirements published by the authority handling your application. If its requirements differ from a preset, enter the exact requested pixel dimensions.
Crop carefully and preserve the original
Start from a sharp, evenly lit source. A crop that trims the top of the head or shoulders may fail an application even if the file size is correct. Do not repeatedly compress a small identity photo; inspect facial detail at the actual output size. Keep the unedited original in case a different crop or higher-quality export is needed.
Separate digital-upload and print workflows
A digital portal may specify a pixel range and a byte limit instead of a physical print size. Follow those instructions directly. A print workflow may require several copies on a sheet, which this tool does not assemble. Use the downloaded single image in a print layout tool or ask a photo service to produce the correct measured prints.
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