Grading Prep
Card Centering Before Grading: A Simple Collector Checklist
Learn why card centering matters before grading, how to look at left/right and top/bottom borders, and how Slabox helps estimate centering.
May 30, 2026 · 4 min read
Centering is one of the easiest grading factors to see, and one of the easiest to ignore when you are excited about a card.
Before sending a raw card for grading, take a minute to look at the borders. It can save you from unrealistic expectations.
What centering means
Centering compares the border width on the left and right, then the top and bottom. A perfectly centered card has balanced borders on both axes.
A card can look clean, sharp, and glossy, but still lose grade potential if the borders are visibly uneven.
Check both directions
Collectors often notice left/right centering first, but top/bottom centering matters too. Some cards look fine in a binder and only reveal the issue when you measure them.
Good lighting and a straight photo help. Avoid judging from angled photos, because perspective can make one side look wider than it really is.
Use tools as a second opinion
A centering tool cannot guarantee a grade, but it can make your expectations more realistic before you submit a card.
Slabox includes a card centering tool that lets you mark borders from a photo and estimate how centering may affect PSA, BGS, or CGC outcomes.