What 8.5 × 11 in means
Several planner systems use Letter-size paper, but finished dimensions do not define their binding holes, covers or disc spacing.
The builder preserves these finished dimensions and will not silently scale the page to make an incompatible imposition fit.
Choose a source sheet and binding clearance
Use direct-size Letter output, or one-up Letter when you need the larger-sheet workflow; the finished page already reaches the sheet edges. One-up A4 fails because A4 is only 210 mm wide, less than the 215.9 mm page. Neither A4 nor Letter can hold two Letter pages side by side at 100%.
Centered and two-up files include crop marks where there is room outside the finished page. A mark is omitted where a source-sheet edge is already the finished edge; this does not change the page dimensions.
The inner content margin moves writing areas away from the selected binding edge. It is content clearance, not a punch-hole coordinate or a promise that a particular punch will fit. Trim first, then align the finished sheet with the punch maker’s physical guide.
Run one measured test
Download a one-page test before committing to a full run. In the print dialog, choose the paper named in your plan, turn off Fit or other scaling, and measure the calibration mark. A mathematically correct PDF cannot predict a printer driver, printable area, feed path, or borderless setting.
After trimming, measure width and height before punching. If the result is off, correct print scaling or the selected source sheet; do not compensate by guessing new page dimensions.