When the template needs more paper.
A template can be valid and still be too large for your paper. Fold to Fit tries both orientations at actual size, then offers supported sheets that can fit.
Look at flat size, not finished size
A tray needs space for the base plus two walls in each direction. A 92 × 62 mm base with 25 mm walls occupies 142 × 112 mm flat. A sleeve needs the entire perimeter plus its glue flap on one sheet.
Account for print marks and margins
On US Letter, the available template area is 199.9 × 221.4 mm. On A4 it is 194 × 239 mm. The tool leaves 8 mm at each side and reserves the top and bottom for a heading and a calibration line.
Those areas apply to this version’s layout, not to every printer. A printer with larger unprintable edges may still clip a template. Check one actual-size print before using your final paper.
Choose a supported sheet that fits
The tool tests a 90-degree rotation automatically. If it still does not fit, the download buttons are disabled. When another supported size fits, use its button to switch the layout, and make sure your printer actually supports that sheet.
US Legal and A3 are options in the tool, not a claim that your printer supports them. If none of the available sizes fits, this version cannot print the design on one sheet.
Reduce coverage only when it suits the gift
You can reduce sleeve band width if less length needs covering, or reduce tray wall height if a lower wall is useful. These choices change the packaging task. Reducing clearance merely to force a fit may make the assembled piece too tight.
Do not use Fit to page as a shortcut
Print scaling changes the base, walls, opening and glue areas together. Keep Actual size / 100% and verify the 50 mm line. This prototype does not support tiled printing; if you need one larger piece across multiple sheets, use a tool with that feature.