How to Grade a Trading Card Yourself

Whether you're submitting to PSA, BGS, SGC, or CGC — or just pricing a card on eBay — knowing how graders think will save you money and disappointment. Every company, and every AI grader, evaluates the same four attributes.

1. Centering

Centering measures how evenly the printed image sits inside the card's borders. Look at the card front and measure (or eyeball) the left-vs-right and top-vs-bottom borders. PSA lists centering tolerances as ratios, for example 55/45 or 60/40.

• PSA 10 centering is usually 55/45 or better on the front, 75/25 on the back.
• PSA 9 is typically 60/40 or better front, 90/10 back.
• Flip the card over — back centering matters too.

2. Corners

Hold the card edge-on and look at each corner against a dark background. You are hunting for:

• Any fraying, fuzz, or white fibers sticking out.
• Soft or rounded corners that don't come to a crisp point.
• Dings — tiny bends from sleeve handling.

One soft corner is the difference between a PSA 10 and a PSA 9. Two is the difference between a 9 and an 8.

3. Edges

Edges are the full perimeter of the card minus the corners. Look for:

• Chipping on dark-bordered cards, where the ink has rubbed off and exposed the white core.
• Rough cuts from the factory that leave uneven edges.
• Whitening along the edge, common on Pokémon and vintage sports cards.

4. Surface

Tilt the card under a bright light to reveal surface issues:

• Print lines, dots, and spots.
• Scratches — from sleeves or handling.
• Indentations and dimples.
• Gloss wear — common on older holographic and foil cards.

Putting it together

Score each of the four areas from 1 to 10 in your head, then take the lowest. That's usually close to the final grade — graders weight the worst sub-score heavily. An AI grading app like ID Grader does this automatically in seconds by analyzing both sides of the card.

A checklist you can run in 30 seconds

1. Front centering — look at all four border gaps.
2. Back centering — flip and check again.
3. Each of the four corners under a desk lamp.
4. Trace the four edges for whitening or chipping.
5. Tilt the card under light for surface defects.
6. Check the back of the card for scratches and print issues.

If anything scores below an 8 in your head, the card is not a PSA 10 candidate. If everything is a 9+, you might be sitting on something worth submitting.