One Design, Checked Print Sizes

What you will work through

• Separate page dimensions, content dimensions, pixels and print scaling.
• Place one 190 × 250 mm content region on two different page sizes.
• Calculate a conservative raster export size from explicit PPI and rounding rules.
• Recognize the difference between fitting an entire page and reflowing a layout.
• Prepare a versioned proof and buyer-size decision record.

Contents

1. 01Decide what should stay the same
2. 02Keep units attached to every calculation
3. 03Place a shared content region on both pages
4. 04Choose between fitting and redesigning
5. 05Set a pixel budget without inventing detail
6. 06Use a calibration proof to detect scaling
7. 07Review usability as well as dimensions
8. 08Name versions so the buyer can choose correctly
9. 09Capstone: release the two Harbor Tasks masters
10. 10Answer key and a maintainable size system

Scope and limitations

• The included SVG masters are original learning worksheets, not a finished marketplace product collection.
• No commercial print certification, universal printer compatibility or color-accuracy guarantee is supplied.
• Physical print checks remain your own device-specific test; local geometry checks do not prove a printed measurement.
• This is about source-size mastering; it does not provide marketplace sales or ranking advice.