Read from PSA’s grading standards page. Checked 2026-09-20. Official page.
“Centering must be approximately 60/40 or better on the front and 90/10 or better on the reverse.”
Ratios that reach MINT 9 but not the grade above, on the front line alone: 57/43 · 58/42 · 60/40.
| Grade | Front | Back |
|---|---|---|
| GEM-MT 10 | ~55/45 | 75/25 |
| MINT 9 | ~60/40 | 90/10 |
| NM-MT 8 | ~65/35 | 90/10 |
| NM 7 | ~70/30 | 90/10 |
| EX-MT 6 | 80/20 | 90/10 |
| EX 5 | 85/15 | 90/10 |
| VG-EX 4 | 85/15 | 90/10 |
| VG 3 | 90/10 | 90/10 |
| GOOD 2 | 90/10 | 90/10 |
| FR 1.5 | ~90/10 | 90/10 |
| PR 1 | — | — |
MINT 9: ~60/40 front, 90/10 back. PSA says "approximately", so the line carries grader discretion. As published: "Centering must be approximately 60/40 or better on the front and 90/10 or better on the reverse."
GEM-MT 10 needs ~55/45 front, 75/25 back, against ~60/40 for MINT 9.
On the published front lines alone: 57/43, 58/42, 60/40 — better than the MINT 9 line but not the GEM-MT 10 line. Corners, edges and surface can only hold or lower the grade.
Compare the two borders on each axis: a card whose left border is 57% of left plus right is 57/43. Services judge the worse axis, front and back separately. SlabbyPrep measures both from a photo to a hundredth of a millimetre.
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