What Does PSA 10 Mean? Gem Mint Requirements Explained

PSA 10 means Gem Mint, the top grade on PSA's 1 to 10 scale. To earn it, a card must be centered within approximately 55/45 on the front and 75/25 on the back, with four sharp corners, clean edges, original gloss and no visible print or surface flaws. It is a virtually perfect card, not a literally perfect one.

What are the PSA 10 centering requirements?

PSA's published centering requirement for a 10 is a tolerance not to exceed approximately 55/45 percent on the front and 75/25 percent on the back. In plain terms, the wider border on the front can be no more than about 55 percent of the total, and the back is allowed to drift much further before it costs the grade.

The word "approximately" does real work. PSA's grading standards page says graders may allow a small variance based on eye appeal, and a footnote grants a 5 percent leeway on front centering for cards grading PSA 7 or better. That is why two cards with identical measurements can land on different grades: a high-contrast border makes a 56/44 shift obvious, while a white border hides it.

To measure, put the card flat, measure the left and right borders in millimeters, and divide each by the sum; then repeat top to bottom. A 3.2 mm left border against 2.6 mm on the right is 55/45, the edge of gem mint. The worse axis is the one that counts. The full ladder by grade looks like this:

The front tightens by roughly five points per grade at the top, while the back is fixed at 90/10 from PSA 9 down to PSA 2. A card badly off center on the back can still be a PSA 9, but never a PSA 10.

Corners, edges and surface at the gem mint level

Centering gets a card in the door, but corners, edges and surface are where most gem mint candidates fail. At the PSA 10 level, all four corners must be sharp with no whitening, fraying or rounding, the edges must be clean and free of chipping, and the surface must keep its original gloss without scratches, print lines, dimples or staining.

Each is evaluated under magnification and angled light, which is why a card that looks perfect in hand often comes back a 9. A single corner with a speck of white where the ink lifted is enough. On dark-bordered cards, edge chipping shows as tiny white specks and is among the most common reasons a 10 is denied. On chrome and holo stock, hairline scratches only appear when the card is tilted.

Print defects count too, even though they came from the factory. A print line through a foil area, a fisheye from dust on the sheet, or a small ink smear can all keep a card at PSA 9, because PSA grades the card as it exists, not as intended. Our guide on how to grade sports cards at home shows the lighting and loupe setup that reveals these flaws.

PSA grading scale explained: 1 through 10

PSA's scale runs from 1 (Poor) to 10 (Gem Mint), and each step carries a name that describes the card's condition in collector shorthand. The scale is cumulative: a card must meet every requirement of a grade, and one weak attribute drops the card to the grade that attribute supports, however strong the rest is.

Here is the ladder as PSA defines it:

• 10 Gem Mint. Virtually perfect: sharp corners, full gloss, centering within about 55/45 front and 75/25 back.
• 9 Mint. One minor flaw, such as a slight wax stain on the back, a small print spot, or centering near 60/40.
• 8 Near Mint-Mint. Looks mint at a glance but shows a small flaw up close: slight wax, a faint corner touch, or centering near 65/35.
• 7 Near Mint. Slight surface wear up close, light corner fraying possible, centering near 70/30.
• 6 Excellent-Mint. Visible surface wear or a print defect, slight corner fraying, centering to 80/20.
• 5 Excellent. Rounding of corners becomes obvious, gloss may be lost, centering to 85/15.
• 4 Very Good-Excellent. Light scuffing, rounded corners, some loss of gloss.
• 3 Very Good. Rounding on all corners, obvious surface wear, possibly light creasing.
• 2 Good. Heavy wear, creasing, scuffing or scratching.
• 1.5 Fair and 1 Poor. Major defects such as heavy creases, missing pieces or writing.

Grades 8 and above are where the market pays premiums, and the jump from 9 to 10 is the largest. Across all submissions, industry statistics compiled by PreGradeCards put the PSA 10 rate at about 8.88 percent, from under 1 percent on vintage to 15 to 30 percent on modern chrome.

What is a half-point grade, and why is there no PSA 9.5?

A half-point grade is PSA's way of recognizing an exceptional example within a whole grade, and it runs from 1.5 through 8.5. PSA introduced half grades on February 1, 2008 and deliberately stopped at 8.5, reasoning that Mint 9 and Gem Mint 10 already gave the top of the scale two Mint-level grades.

A half grade is not a midpoint. A PSA 8.5 clearly beats typical PSA 8 copies but does not satisfy the PSA 9 standard. In the announcement, covered by Sports Collectors Digest, PSA said centering is the most likely factor to earn the half point because it is the flaw collectors see first, though strong corners or print quality can also tip a card up. PSA cited the 1955 Topps Sandy Koufax rookie, where a PSA 8 sold near $2,200 and a PSA 9 brought $18,000 or more, as the gap the half grade was built to bridge.

The missing 9.5 separates PSA from Beckett, which grades 9.5 as its own Gem Mint tier, and it is one reason the two labels do not map one to one.

PSA 9 vs 10: where cards actually miss

The difference between a PSA 9 and a PSA 10 is usually one flaw, and it is almost always small. A PSA 9 is a superb card with a single minor issue, so a 10 candidate that shows one print spot, one soft corner, or centering between 55/45 and 60/40 becomes a 9. The grader is not weighing the card's strengths, only searching for the one thing that disqualifies it.

In practice, the misses cluster around a few causes:

1. Centering just outside 55/45 on either axis, or a back that exceeds 75/25.
2. A single corner with faint whitening visible under a loupe but not to the naked eye.
3. Surface scratches on foil or holo that only appear under angled light.
4. Print lines and print dots from the press, which PSA treats as defects regardless of origin.
5. Edge chipping on dark-bordered cards, especially along the top edge.

A scan with SnapCard before submission flags copies that measure outside 55/45, which are 9s before the corners are checked.

That one flaw is expensive. A 1989 Upper Deck Ken Griffey Jr. sold for $400 to $425 in PSA 9 and $4,900 to $5,100 in PSA 10 as of June 2026, a gap of more than 10x driven by a 3.4 percent gem rate. We work through six dated examples in our post on the PSA 9 vs PSA 10 price difference, and the submission math is in is card grading worth it in 2026.

How does PSA 10 compare to BGS 9.5, SGC 10 and CGC 10?

A PSA 10 is comparable in condition to a BGS 9.5, an SGC 10 and a CGC 10, but it is not priced the same. As of 2026 a BGS 9.5 sells for 70 to 80 percent of the PSA 10 price, and PSA 10 premiums over SGC 10 and CGC 10 run from a few percent on cheap cards to 30 to 50 percent on high-value modern rookies.

The reason is scale, not standards. Beckett's 10 requires all four subgrades at 9.5 or higher, so a BGS 10 is rarer than a PSA 10 and often trades above it. SGC's and CGC's 10s are similar in tolerance to PSA's, and CGC adds a 10 Pristine above Gem Mint. A 2026 comparison by PreGradeCards of the Evolving Skies Umbreon VMAX alternate art found about $3,500 in PSA 10, $2,800 in CGC 10, $2,600 in BGS 9.5 and $2,400 in SGC 10.

Which label to choose is covered in our PSA vs BGS vs SGC guide. For most modern cards, the PSA 10 remains the price-setting grade.

What qualifiers mean on a PSA label

A qualifier is a two-letter code PSA adds when a card meets a grade's standard in every respect except one, and that flaw would otherwise drag the grade down several points. The number describes everything else about the card; the qualifier says what to look for.

The qualifiers, explained in CardGrade's qualifier guide, are OC for off-center, ST for stain, PD for print defect, MK for marks, MC for miscut and OF for out of focus. A PSA 8 (OC) has PSA 8 corners, edges and surface with centering below the PSA 8 line. Submitters can request no qualifiers, in which case the card receives the lower grade the flaw supports.

Qualified cards trade at a discount, often near the price of the unqualified grade two or three steps down. For a buyer that can be an opportunity on vintage sets where centering was poor across the print run. For a submitter, a qualifier is never the outcome you are paying for.

How to check your own card against the standard

Checking a card against the PSA 10 standard takes a ruler, a loupe, a bright angled light and about five minutes per card. The goal is to find the one flaw a grader would find, and to be honest about it before you spend $80 or more per card in 2026.

1. Measure centering both ways and note the worse ratio. Anything past 55/45 front or 75/25 back is a 9 at best.
2. Examine each corner under 10x magnification. Look for white showing through the ink, not just visible rounding.
3. Run the loupe along all four edges, especially dark borders where chipping shows.
4. Tilt the card under a single bright light and rotate it slowly; scratches, print lines and dimples appear as the reflection moves.
5. Check the back with the same care; backs are looser on centering but not on corners or surface.

A second opinion helps. Scanning both sides with SnapCard returns a condition estimate on the PSA 1 to 10 scale with recent sale records, so you can see whether your read agrees and what each outcome sells for. The app also reads the label on graded PSA, BGS, SGC and CGC slabs, useful when comparing a raw card against graded comps. No estimate replaces the grader, but one that disagrees with yours is the cue to look again.

Bottom line

PSA 10 means Gem Mint: a perfect card centered within about 55/45 front and 75/25 back, with sharp corners and a clean surface. A PSA 9 is that card with one minor flaw, which can cut the price by half or by 90 percent depending on population. Half grades stop at 8.5, and a PSA 10 matches BGS 9.5, SGC 10 and CGC 10 in condition while leading in price.