Methodology
How Card Dimensions checks published sizes, calculates conversions and labels uncertainty.
Reading a size reference
For example, Dragon Shield’s sleeve specification supports a Pokémon reference of 63 × 88 mm. It describes the card size accepted by an accessory; it does not state a Pokémon manufacturing tolerance or the space inside the sleeve.
How sizes are checked
Source links sit beside the relevant size or product. A maker’s catalogue describes that product; an approximate rule stays approximate; a sleeve’s supported card size is compatibility evidence, not a card measurement. Public summaries of standards are identified as secondary sources. Retrieval dates and claim notes are retained in the source records.
Conversions use the same reference dimensions as the drawings and tables. Rounded conversions do not add precision, and matching reference sizes do not establish identical thickness, corners or manufacturing tolerances. A review date changes when its source evidence is checked again.
Physical measurements
No physical card samples have been measured by Card Dimensions. The listed figures come from published sources. Any future measurements will identify the sample, instrument, readings and date, and will describe only that sample.
Screen and print scale
The actual-size viewer matches an on-screen outline to a standard ID-1 bank card. Edge alignment, the reference card and display settings affect the result. Recalibrate after changing monitors, even if the viewer does not detect a change. For printouts, use the check bar to check the printed scale with a ruler.
Software checks cover calculations and viewer behavior. Physical display and printer accuracy have not been measured.
Writing and drawings
Prose drafts are AI-assisted. Source checks and software checks are separate from physical testing. The drawings are blank geometric outlines calculated from the listed sizes; they do not reproduce card artwork. They are available under the drawing licence.