Is My Card Centered
Learning Center
These guides explain the inspection concepts behind the tools on Is My Card Centered? They are written for collectors who want a practical way to think about centering, photo quality, corners, edges, and pre-submission risk without treating any tool output as a guaranteed grade.
Start with the Centering tool when you need photo-based ratio measurements, use the manual centering calculator when you measured borders with a ruler or calipers, read the Centering Guide for step-by-step tool instructions, use Pre-Screen when you want a guided card-photo checklist, open Card Review for deeper AI-assisted review, and use Gem Finder for PSA population and gem-rate context.
The Learning Center focuses on repeatable collector workflows rather than official grading-company rules. Each guide explains how to prepare a cleaner photo, how to read visible condition signals, and how to decide when a card needs a closer look before money is spent on grading fees, shipping, or supplies.
Use the articles as practical context for the tools on this site. They are meant to help you understand uncertainty, not to replace hands-on inspection or the current submission instructions from PSA, BGS, TAG, CGC, or any other grading company.
Enter left, right, top, and bottom border measurements from a ruler, calipers, scan, or other non-photo workflow.
Learn when automatic estimates are useful, when manual guide checks matter, and how photo quality changes measurement confidence.
See how common ratio labels translate into border balance, including examples where one axis is stronger than the other.
Understand why centering can limit upside even when the rest of the card looks clean, and why the same ratio can carry different risk across cards.
Set up photos that make centering, corners, edges, and surface checks easier to review before submitting or buying.
Review frequent risk areas such as whitening, corner softness, edge wear, print lines, dents, and hidden surface marks.
Learn what to look for around corners and edges, including chips, whitening, lifts, rough cuts, and lighting artifacts.
If you are new to card inspection, start with photo setup, then learn centering ratios, then review corner and edge wear. If you are deciding whether to submit a specific card, measure centering first, inspect the front and back for visible wear, and use population context only after you understand the card's actual condition risk.
For a card that looks borderline, compare more than one photo before making a decision. A clean straight-on image can make a measurement more trustworthy, while glare, compression, shadows, sleeves, and background edges can make the same card look stronger or weaker than it really is.
