Ratio describes shape
Aspect ratio compares width with height, independently of absolute size. A 2:3 image and a 4:5 print area have different shapes even if both are called portrait. You must decide what to do with that mismatch. Cropping removes content, fitting introduces unused space, and stretching changes the image geometry. Each can be an intentional design choice, but none should happen accidentally at the final ordering step. Establish the shape before calculating enlargement.
Keep important content away from uncertainty
Place meaningful text, signatures and faces with the receiving layout in mind. Do not assume the visible preview includes every trimming tolerance or border. Ask the printer about the final cut area and any required bleed. A composition that barely preserves a signature in the export may not preserve it after trimming. Record which edges can be cropped and which must remain. This is particularly important when the image itself is the complete artwork.
A concrete mismatch
A fictional 3000 by 4500 pixel image has a 2:3 ratio. To fill an 8 by 10 inch 4:5 area without distortion while using the full 3000 pixel width, the crop height becomes 3750 pixels. You discard 750 pixels from the original height. Alternatively, fit the entire 2:3 image inside the 4:5 area and accept borders. Calculate the actual retained dimensions after that choice. Do not use the uncropped 4500 pixel height to claim extra density in the final filled print.
Make the handoff observable
Send a small visual placement proof with the production file when the workflow permits it. Label it as a placement reference, not the high-resolution artwork. Note whether borders are intentional and whether the image may be recropped. Inspect the order preview before confirmation. If the printer automatically fills the frame, choose its appropriate fit option or supply a correctly prepared layout rather than assuming the software will infer your intention.
Sources used for this page
These records support the facts and comparisons above. Merchant-controlled records are labelled so you can separate product claims from independent evidence.
- Adobe image size and resolution reference — Merchant documentation · helpx.adobe.com · Merchant-controlled · checked 2026-09-25
- Let's Enhance print-preparation help (September 16, 2026) — Merchant documentation · help.letsenhance.io · Merchant-controlled · checked 2026-09-25