What PSA, BGS, CGC, SGC, TAG and ACE actually require for each grade, with the official centering tolerances, qualifiers and how the companies differ.
9 articles
PSA 10 allows about 55/45 front and 75/25 back; PSA 9 allows 60/40 and 90/10. The gap in millimeters, gem-rate data, and whether a 58/42 card is worth grading.
TAG centering tolerances for every grade: ~51/49 for Pristine 10, ~55/45 for Gem Mint 10, the sports vs TCG back split, the 1000-point score, how TAG measures.
Off-center and miscut are not the same. PSA's official OC and MC qualifier definitions, the 2021 policy change, the N8 no-grade, and how each affects value.
CGC centering standards explained: Pristine 10 is 50/50, Gem Mint 10 allows about 55/45 front and 75/25 back, Mint 9 is 60/40. Every grade, plus CGC vs PSA.
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.
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.
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.
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.
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.