What Centering Do You Need for a PSA 10? Grading Guide

When submitting trading cards for professional grading, centering is one of the most critical factors in achieving a PSA 10 grade. Understanding the exact requirements can help you decide which cards are worth sending in and how to assess them accurately.

PSA 10 Centering Requirements Explained

PSA (Professional Sports Authenticator) uses strict criteria for grading. For a card to earn a PSA 10 (Gem Mint), it must meet the following centering standards:

• Front of the card: Centering must be at least 55/45 or better on all sides.
• Back of the card: Centering should be at least 75/25 or better on all sides.

This means that the borders on the front can be off by a maximum of 55% to 45% (left/right or top/bottom), and the back can be off by up to 75% to 25%. Any card outside these thresholds cannot receive a PSA 10 due to centering, regardless of other condition factors.

How to Measure Card Centering

To check if your card meets these requirements, you need to compare the width of the borders on opposite sides. Here’s a simple way to do it:

• Measure the left and right borders (and top/bottom, if needed) using a ruler or digital caliper.
• Add the two border measurements together for the total border width.
• Divide each border by the total to get the percentage for each side.
• Compare the ratio to the allowed 55/45 front and 75/25 back thresholds.

For example, if the left border is 2 mm and the right is 3 mm, the total is 5 mm. The ratio is 2:3, or 40% to 60%—not within the 55/45 requirement for a PSA 10.

Tools like Midpoint can make this process easier by analyzing your card’s image and giving you precise centering percentages, saving time and reducing guesswork.

Tips for Pre-Grading Your Cards

• Always check centering under good lighting and with accurate tools.
• Remember that even small centering flaws can impact the grade.
• Use digital tools to double-check your manual measurements.
• Be aware that different card sets and years may have print variances, but PSA’s centering standards remain consistent.

By ensuring your cards meet or exceed the centering requirements, you improve your chances of achieving that coveted PSA 10. Careful pre-grading can save grading fees and disappointment down the road.