Centering ceiling by service for a card whose worst axis measures 50/50 (front; back not considered here). The ceiling is the highest grade whose published centering line the card meets. Corners, edges and surface can hold or lower it, and PSA gives a 5% front leeway for cards that grade PSA 7 or better, so up to 5 points beyond its line may still pass on strong eye appeal. How to measure the ratio.
Measure your own card in the browser →| Service | Centering ceiling | |
|---|---|---|
| PSA | GEM-MT 10 | line: ~55/45 front |
| Beckett (BGS) | Pristine 10 / Black Label | line: 50/50 front |
| CGC Cards | Pristine 10 | line: 50/50 front |
| SGC | 10 Pristine | line: 50/50 front |
| TAG | Pristine 10 | line: ~51/49 front |
| ACE | Gem Mint 10 | line: under 60/40 (side not stated) |
“~” is the company’s own “approximately”; “under” marks ACE’s lines, which exclude the boundary (“less than” or “greater than” a split), so a card exactly on the figure does not meet them.
On the published line, yes: 50/50 meets PSA’s ~55/45 front line for GEM-MT 10, and the back must also be within 75/25. Corners, edges and surface can hold or lower the grade.
On published lines alone, BGS (Pristine 10 / Black Label), CGC (Pristine 10), SGC (10 Pristine) and TAG (Pristine 10) are level at the top: each a Pristine grade, above Gem Mint. Market value per grade differs by service, which is what the Advisor accounts for.
Other ratios: 55/45 · 60/40 · 65/35 · 70/30 · 75/25 · 80/20 · 85/15 · 90/10 · six services by grade · most lenient grader · every service’s lines