Quick answer
Cards vary by manufacturer; verify width, height, corner radius, and sleeve fit with samples. Poker, bridge, mini, Euro, tarot, square, and custom are useful labels, not a universal specification.
Creator workflow
Capture the actual specification, quote, or platform setting for your project, then use the related calculation with those values rather than a generic market assumption.
Common mistakes
Do not treat a category label, supplier term, or platform policy as a universal product specification. Confirm the current version, territory, and contract terms that apply to you.
Related calculators
Limits
This is educational planning material, not supplier, legal, tax, or platform advice.