Understanding Card Centering

Centering is one of the most critical factors in card grading, and it's often the reason cards miss a PSA 10.

How PSA Measures Centering

PSA measures centering as a ratio of the left-to-right and top-to-bottom borders.

PSA 10 Requirements:

Front: 60/40 or better in both directions

Back: 75/25 or better

PSA 9 Requirements:

Front: 65/35 or better

Back: 90/10 or better

How to Check Centering

1. The Ruler Method: Use a millimeter ruler to measure each border 2. The Eye Test: Compare opposite borders visually 3. AI Analysis: Our tool automatically calculates centering percentages

Common Centering Issues

Left/Right Shift: Most common issue

Top/Bottom Shift: Often overlooked

Diamond Cut: Card cut at an angle

Tilt: Entire image is tilted within borders

Pro Tips

1. Always check BOTH sides of the card 2. Centering standards vary by card era 3. Vintage cards have more lenient standards 4. Modern cards are held to stricter standards

The Complete Guide to Card Centering: What PSA Really Looks For