Card grading
How Sports Card Grading Works, Step by Step
Sports card grading explained: submission, authentication, the 1–10 scale, sealed slabs, cert number lookups, and what a grade can't tell you.
, 9 min read
Grading turns a card's condition into a number on a sealed label, and that number often matters more to a buyer than anything else about the card. These guides cover how professional grading works, what graders look at in centering, corners, edges and surface, how the major companies' scales and labels differ, and how to decide whether a card is worth submitting at all. They also show you how to pre-grade at home with good light, a loupe and a steady routine, so that you only send cards with a realistic shot at a high grade. Grading fees and turnaround times change often, so the guides explain where to check them rather than quoting them. Sporta's AI condition pre-grade appears where it genuinely helps: it is an estimate from your photos, useful for sorting a stack and spotting obvious flaws, and it is not an official grade from any grading company.
Card grading
Sports card grading explained: submission, authentication, the 1–10 scale, sealed slabs, cert number lookups, and what a grade can't tell you.
, 9 min read
Card grading
PSA vs BGS vs SGC compared: grading scales, Beckett sub-grades, slab and label styles, and how collectors pick the right grading company for each card.
, 8 min read
Card grading
Card centering explained: measure each border, turn the widths into ratios like 55/45, check the front and back, and spot diamond cuts before you grade.
, 9 min read
Card grading
Is my card worth grading? Identify it, compare raw and graded comps, inspect its condition honestly, then weigh fees, waiting time and why you want a slab.
, 9 min read
Card grading
Learn to pre-grade sports cards at home: the light, loupe and routine for checking centering, corners, edges and surface before you pay to grade.
, 9 min read