How-To13 min read
What 55/45, 60/40, 65/35 and 70/30 Centering Mean in Millimeters
Centering ratios in millimeters: what 55/45, 60/40, 65/35 and 70/30 centering look like on Pokémon, sports and Japanese borders, plus grade limits per grader.
Card Centering & Grading Articles
Practical, research-backed guides for collectors: how centering is measured, what each grading company really requires, how to estimate your grade before you submit, and how to photograph and protect your cards. New articles are published several times a week.
Grading Standards11 min read
Is 60/40 Centering a PSA 10? What PSA Says vs What Actually Grades
Is 60/40 centering a PSA 10? PSA's published Gem Mint standard is now 55/45 front and 75/25 back; 60/40 is the PSA 9 line. What that means for your card.
Read article →
Grading Standards12 min read
BGS Centering Standards: Black Label, Pristine 10, 9.5 and 9 Explained
BGS centering standards per grade: 50/50 front and 55/45 back for a Black Label or Pristine 10, 55/45 for a 9.5, how subgrades set the grade, and BGS vs PSA.
Grading Standards15 min read
Does Back Centering Matter? PSA, BGS, CGC, SGC and TAG Back Tolerances
Yes, back centering matters. Official back tolerances per grade for PSA (75/25), BGS (55/45), CGC and TAG, why backs are looser, and how to measure them.
Grading Standards13 min read
PSA Centering Standards (2026): 55/45, 75/25 and Every Grade Explained
PSA's official centering standards for every grade, PSA 10 to 1.5, front and back: 55/45, 75/25, the 5% leeway, OC qualifiers and what 58/42 really gets.
How-To15 min read
How to Measure Card Centering at Home: Ruler, Caliper, Pixels or App
How to measure card centering at home with a ruler, caliper, scanner pixels or an app: the formula, which edges to measure, mm examples and how precise to be.
Grading Standards13 min read
Card Centering Tolerances by Grade: PSA, BGS, CGC, SGC, TAG, ACE
Every official card centering tolerance by grade in one table: PSA, BGS, CGC, SGC, TAG and ACE, front and back, verified August 2026, and how to read it.