Sports Card Condition Grading Scale Explained

The four factors every grader checks

PSA, BGS, SGC, and CSG all score the same four things, even though their exact weighting and label wording differ slightly:

Corners— any softening, whitening, or fraying at the four tips. This is usually the first thing to go on a card carried loose in a pocket or box.
Edges— chipping or roughness along the card's cut lines, most visible on dark-bordered cards where white core shows through.
Surface— scratches, print dots, wax stains, indentations, or gloss loss across the card face and back.
Centering— how evenly the image sits inside the border, usually expressed as a left/right and top/bottom ratio (for example 55/45).

A card can look flawless to the eye and still miss a 10 on centering alone — it's the factor collectors most often overlook when self-grading.

Reading the 1-10 scale

10 / Gem Mint— no visible flaws under normal light, sharp corners, centering within roughly 55/45 or better on both axes.
9 / Mint— one minor flaw — a slightly soft corner tip or centering closer to 60/40 — with everything else clean.
8 / NM-MT— light surface wear or minor corner softening visible on close inspection, still sharp at a glance.
7 and below / Near Mint and lower— visible wear, edge chipping, or noticeable off-centering that most collectors would spot without magnification.

Below a 7, grades exist (Excellent, Very Good, Good, Fair, Poor) but modern cards rarely get submitted at that condition — the grading fee usually costs more than the value the grade adds.

Raw self-grade vs. an actual PSA/BGS number

A self-graded estimate is a starting point, not a guarantee. Two things routinely surprise collectors when a raw “probably a 9” card comes back from a grader:

Surface flaws under a grader's light and loupe catch print dots and hairline scratches that are invisible in normal handling or a phone photo.
Centering measured with calipersis stricter than an eyeball estimate — a card that looks centered can still measure 65/35 once actually checked.

Practice reading these factors against real graded examples with Guess the Grade, then estimate your own card's realistic grade range before committing to a submission with the pre-grade estimate tool.

Why the same numeric grade isn't always the same price

Once you have a realistic grade estimate, the grading company you submit to still changes what that number is worth on resale:

See PSA vs BGS vs SGC vs CSG for how the same condition can carry a different market grade label and resale value depending on which company grades it.
See PSA 10 vs PSA 9 grade point value for how big the price gap between one grade point actually is, and when it's big enough to justify a resubmission.

Check before you submit, not after

Grading fees are non-refundable regardless of the grade a card comes back with, so a realistic self-grade is what protects the fee from being wasted on a card that was never a 9 or 10 to begin with.

Check corners and edges under a bright, raking light — wear that's invisible under flat overhead light often shows up immediately at an angle.
Measure centering against the border on both the front and back — a grader scores whichever side is worse.
Once you have a grade estimate, run the numbers through grade submit ROI before paying a service tier — see also how to submit cards for grading.