What is a PSA graded card? Grades, slabs and why they matter
PSA — Professional Sports Authenticator — is the most widely recognised third-party card grading service in the hobby.
A card sent to PSA is authenticated, graded on condition, and sealed into a tamper-evident holder with a unique certificate number. That number is the point: anyone can look it up and confirm the card is what the label says.
What the grade actually measures
The grade is a condition judgement, on a 1 to 10 scale. It is assessed on four things: centring, corners, edges and surface. A card with a printing quirk, a soft corner or a scuff loses ground on the relevant axis.
The grade says nothing about how rare or desirable the card is. A common card can grade 10; a chase card can grade 6. Rarity and condition are separate questions, and the market prices both.
- PSA 10 — Gem Mint: virtually flawless to the eye
- PSA 9 — Mint: one minor flaw, hard to spot
- PSA 8 — Near Mint-Mint: light wear on close inspection
- PSA 7 and below — progressively more visible wear
- Authentic — genuine, but not assigned a numeric grade
Why the slab matters more than the number
Before the card is graded, it is authenticated. That single step removes the question that hangs over every raw card bought from a stranger: is it real?
Once sealed, the holder is tamper-evident — a swapped or resealed card is visible. So a slab carries two guarantees at once: this card is genuine, and it was in this condition when a neutral third party looked at it.
How to verify a graded card yourself
Every slab has a certificate number printed on its label. PSA publishes a public lookup for those numbers on its own website.
Enter the number and you should see the same card, the same set and the same grade as the label in your hand. If the lookup disagrees with the slab, the slab is the thing to distrust. This check takes seconds and is worth doing on any graded card you buy from anyone, anywhere.
Is grading worth it for your own cards?
It depends on the card. Grading costs money and takes time, and a low grade on a mid-value card can leave you worse off than you started — the fee is spent whatever comes back.
The case for grading is strongest on cards that are already valuable and already look clean, where the difference between a 9 and a 10 is worth more than the fee. For everything else, it is usually not the move.
Where graded cards fit on 90s Card
Our classic packs are built around graded cards, so the authentication and condition question is settled before a card ever enters a pack. What you pull arrives in its slab.
That is also what makes an instant buyback offer possible at all: a graded card has an agreed identity and condition, so it can be valued without an inspection and an argument.
Frequently asked questions
- What does PSA 10 mean?
- Gem Mint — the top grade on PSA's 1-to-10 scale, given to a card that is virtually flawless on centring, corners, edges and surface.
- Does a high grade mean the card is valuable?
- Not on its own. The grade measures condition only. Value comes from the card itself — its set, its rarity and demand for it — with the grade acting as a multiplier on top.
- How do I check that a PSA slab is genuine?
- Every slab carries a certificate number on its label. PSA publishes a public lookup for that number on its website; the result should match the card, set and grade in front of you.
- What is the difference between PSA, BGS and CGC?
- They are competing grading companies with their own scales and label designs. PSA has the widest recognition and the deepest price history, which is why its grades tend to be the reference point in the market.
- Should I get my own cards graded?
- Only where the card is already valuable and already looks clean. Grading fees are spent whatever grade comes back, so on mid-value or visibly worn cards the maths usually does not work.
Pull graded cards, not question marks
Our classic packs are built around graded cards — authenticated and condition-assessed before they ever reach a pack.
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