Why Grading Your Cards at Home Matters
Professional card grading services like PSA, BGS, and CGC charge money per card and can take weeks or months to return your cards. Before you send anything off, you should know how to evaluate your cards yourself. Home grading helps you decide which cards are worth the cost of professional grading and which ones are not.
This guide teaches you the basics of card grading so you can assess your collection at home with confidence.
What Professional Graders Look At
Every professional grading company evaluates the same four areas. Understanding these categories lets you predict roughly what grade a card will receive.
Centering
Centering refers to how evenly the card image is positioned within the borders. On a perfectly centered card, the border is the same width on all four sides. Graders measure centering as a ratio, like 60/40 (slightly off-center) or 50/50 (perfect). Cards with visible off-centering, where one border is noticeably wider than the opposite side, lose points.
How to check at home: Hold the card at arm's length and compare the left border to the right, then the top to the bottom. A ruler can help you measure precisely.
Corners
Card corners should be sharp and clean. Graders examine corners under magnification for any rounding, fraying, or whitening. Even tiny imperfections that are invisible to the naked eye can lower a grade.
How to check at home: Use a magnifying glass or your phone's zoom camera to inspect each corner closely. Look for any white spots or softness.
Edges
The edges of the card should be smooth, clean, and free of whitening, chipping, or roughness. Run your finger along each edge to feel for imperfections, then inspect visually under good lighting.
How to check at home: Hold the card at an angle under a bright light. Whitening on edges shows up clearly when the light catches it.
Surface
The card surface should be free of scratches, scuffs, print lines, stains, and indentations. For holographic cards, the holo surface is especially prone to scratching. Surface damage is often the hardest category to evaluate because some imperfections only show under certain lighting angles.
How to check at home: Hold the card under a bright light and tilt it slowly at different angles. Scratches and surface imperfections will catch the light and become visible.
The Grading Scale Simplified
Most grading companies use a 1-10 scale. Here is a simplified breakdown:
- 10 (Gem Mint): Perfect in every way. No visible flaws even under magnification.
- 9 (Mint): Near perfect with only the tiniest imperfection, such as very slight off-centering.
- 8 (Near Mint-Mint): Minor imperfections visible under close inspection. Still an excellent card.
- 7 (Near Mint): Slight wear visible to the naked eye. Small corner whitening or light edge wear.
- 6 and below: Noticeable wear including corner rounding, edge whitening, surface scratches, or creases.
Tools You Need for Home Grading
- A bright desk lamp or ring light: Good lighting is essential for spotting surface imperfections.
- A magnifying glass or jeweler's loupe: 10x magnification lets you see what graders see.
- A dark, clean surface: A black cloth or mat provides contrast and keeps the card clean during inspection.
- Penny sleeves and top loaders: Protect cards that pass your grading inspection.
Which Cards Are Worth Professional Grading
Professional grading costs money, so you want to be selective. Generally, consider sending a card for professional grading if:
- The card is worth at least $50 or more ungraded
- You believe it will grade 8 or higher
- A high grade would significantly increase its value
- You plan to sell it or want it authenticated
For most casual collectors, home grading is sufficient to understand their collection's condition.
Track Your Cards and Their Condition
As you grade your cards at home, keep a record of what you find. A digital collection tracker makes this easy. Riivster lets you scan any Pokemon, Yu-Gi-Oh, or Magic: The Gathering card for free, building a digital inventory that you can annotate with condition notes. Try Riivster free at riivster.com to start cataloging your graded and ungraded cards in one place.