Card Grading Scale Explained — What PSA 10 Actually Means
A 10 isn't 'perfect' and a 9 isn't 'near perfect' — the grading scale is stricter than most collectors think, and the price gap between grades can be 10x. Here's the scale decoded, and how to know where your card lands before you pay a grading fee.
The scale: 1 to 10, four sub-grades
Centering, corners, edges, surface — the overall grade is the weakest-link story. Understanding sub-grades is understanding why your card got the number it got.
Check my card's condition →Why 9 vs 10 can be thousands of dollars
Population: a 10 might be 5% of a card's graded count. Scarcity at the top is the whole premium — which is why pre-grading matters.
Learn about grading online →Know your grade before you submit
SlabVision's scan scores all four categories with PSA-style confidence — no more paying $25 to find out you mailed them an 6.
SlabVision estimated pre-grade demo →PSA vs SGC vs BSG — same scale, different eyes
The companies weight categories differently. Compare their markets and pick the right grader for your card before you submit.
PSA vs SGC compared →Grading Scale — FAQ
What does a PSA 10 mean?
Gem Mint: essentially as-pulled condition, razor corners, dead-centered, flawless surface. It's not 'perfect' — it's the top of what survives handling, and only a small share of cards earn it.
What's the difference between PSA 9 and PSA 10?
One slight flaw anywhere — a touch of corner wear, an off-center front, a print line. But price-wise it's often the biggest gap on the scale because 10 populations are so small.
What are sub-grades?
Centering, corners, edges, and surface each scored separately. Sub-grades explain exactly why a card received its overall number — and SlabVision gives them to you before submission.
How do I know what my card will grade?
Scan it. A pre-grade scan scores all four categories and gives a PSA-scale estimate with confidence — so you decide with data whether the fee is worth it.