Read from ACE’s grading scale page. Checked 2026-10-28. Official page.
“An Ace 10 will not be marked, stained or damaged, and will have centering that is less than a 60/40 split.”
ACE does not say front or back for its 10; applied to both.
On the front line alone, a worst axis under 60/40 meets the Gem Mint 10 line, the top published line. Ratio pages: 50/50 · 55/45.
| Grade | Front | Back |
|---|---|---|
| Gem Mint 10 (side not stated; applied to both) | under 60/40 | under 60/40 |
| Mint 9 | under 65/35 | under 70/30 |
| NM-MT 8 | under 70/30 | under 75/25 |
| NM 7 | under 75/25 | under 80/20 |
| EX-MT 6 | under 80/20 | under 80/20 |
| EX 5 | under 80/20 | under 80/20 |
| VG-EX 4 | under 80/20 | under 80/20 |
| VG 3 | under 85/15 | under 85/15 |
| Good 2 | under 85/15 | under 85/15 |
| Poor 1 | under 85/15 | under 85/15 |
“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.
Gem Mint 10: under 60/40 (side not stated). A card exactly on the figure does not meet it. As published: "An Ace 10 will not be marked, stained or damaged, and will have centering that is less than a 60/40 split." ACE does not say front or back for its 10; applied to both.
On the published front lines alone, a worst axis under 60/40 meets the Gem Mint 10 line, the top published line. Of the ratios with their own page: 50/50, 55/45. 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 reads both from a photo and shows each border to a hundredth of a millimetre; on synthetic test photos, 97% of the readings it shows without a warning are within 1 percentage point (the methodology page has the full results).
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