Direct answer. Set the photo to 4 × 6 in (102 × 152 mm) in PrintExactly, place it on a sheet that matches the loaded paper, confirm Scale to Fit is off and Scale is 100%, then print.

The 3-step method

  1. Set the Photo Frame to 4 × 6 in (102 × 152 mm). Open PrintExactly and type 4 in × 6 in, or 102 × 152 mm, as the Frame dimensions. This is the most common North American standard photo size.
  2. Place one or many copies on the sheet. A single 4 × 6 fits any sheet larger than 4 × 6. For multiple copies, set the copy count, use Fill Page, or run Auto Arrange.
  3. Confirm 100% scale and the printable area, then print. Turn off Scale to Fit in the macOS print panel, set Scale to 100%, and confirm the printable area shows the full 4 × 6. Send the job.

Why a 4 × 6 photo prints the wrong size on Mac

  • Fit to Page quietly shrinks the photo. If the document is sized to Letter but the loaded paper is A4, macOS shrinks the photo to 4.06 × 6 inches or so. Match document paper to loaded paper.
  • Borderless mode shifts scale. Borderless prints often shift scale 1–2% to push the image to the paper edge. Use bordered paper for exact-size 4 × 6 output.

Frequently asked questions

How big is 4 × 6 in millimeters?

4 × 6 inches = 101.6 × 152.4 mm, typically rounded to 102 × 152 mm. PrintExactly accepts both forms.

Can I print multiple 4 × 6 photos on one Mac page?

Yes. Set the copy count for the 4 × 6 item, add other sizes, and PrintExactly packs them on a single sheet or across multiple sheets.

Print a photo at exact size on Mac · Full exact-size Mac guide · Print multiple photos on one page on Mac