Glossary

Definitions of trading-card terminology — rookie cards, refractors, parallels, grading scales, set-line names, and more.

• ParallelA parallel is a variant of a base trading card with a different border, foil, color, or numbering — same player and design, different visual treatment and print run.
• Raw CardA raw card is an ungraded trading card. It has not been submitted to a third-party grading service and carries the seller's subjective condition description rather than an authenticated numerical grade.
• RefractorA refractor is a chromium-finish parallel with a rainbow reflective surface, originated by Topps Finest in the early 1990s and now a standard parallel format across the industry.
• Rookie Card (RC)A rookie card (RC) is a player's first officially licensed trading card, usually issued during their rookie professional season.
• Serial-Numbered CardA serial-numbered card is stamped with its position within a known print run — for example 23/99 means card 23 of 99 produced. Numbering is the primary scarcity signal in modern trading cards.
• Slabbed / Graded CardA slabbed or graded card has been authenticated and encased in a tamper-evident plastic case by a third-party grading service, with a numerical grade representing its condition.