Articles

Centering, grading and card photography

Practical guides for collectors who want to know where a card stands before paying to grade it.

Centering is the one grading factor you can measure precisely at home, and small mistakes in how you photograph or measure a card can move the result by ten points or more. These articles explain how centering is calculated, what PSA, BGS and CGC publish for each grade, how to take photos that measure accurately what else to check before you submit, and which older cards look undervalued right now. Each guide works with a ruler or overlay as well as with the free CardCenter Pro tool.

23articles & guides
6topics
MonthlySleeper Alerts WeeklyMarket index

Centering basics · Start here

How to measure trading card centering

The formula graders use, a worked example, three ways to measure and the mistakes that throw your numbers off, including angled photos, rounded corners and full-art cards.

· 7 min read Read →

Grading standards

Centering standards: PSA vs BGS vs CGC

Each company allows a different amount of off-centering for each grade. Their published front and back tolerances, side by side, and how to read them.

· 6 min read Read →

Photography

How to photograph cards for accurate centering

Light, background, angle and phone settings for sharp, straight photos. Five minutes of setup is the difference between a measurement you can trust and a guess.

· 6 min read Read →

Advertisement

Measure your card nowFree, private and instant. Auto-align finds the edges for you, and your photo never leaves your device.

Open the tool

Have a question you'd like us to cover? Tell us.