What makes a card grade a 10?
A Gem Mint 10 is the top of the scale, and it demands near-perfection across four sub-grades: centering, corners, edges and surface. Here is exactly what each one requires — and how to check your card before you pay to submit it.
The four sub-grades
Centering
Target: 50/50 to 55/45The print image centered within the border. A 55/45 split or better is usually required for a 10; anything past 60/40 typically caps the overall grade. Front and back centering are both measured.
Corners
Target: Sharp, no whiteningCrisp, untouched corners with no fuzzing, dings or whitening. Even a single softened corner can drop a card from a 10 to a 9. Corners are the most common grade-killer on modern holos.
Edges
Target: Clean, no chippingSmooth, factory-sealed edges free of chipping, fraying or shelf wear. Edge whitening on dark-bordered cards is especially visible and frequently limits the grade.
Surface
Target: No prints, scratchesA flawless surface with no print lines, scratches, dimples, indentations or factory defects. Surface issues are often invisible to the naked eye but show clearly under a scan.
Common questions
What makes a card grade a 10?
A 10 (Gem Mint) requires near-perfect centering (typically 55/45 or better), four sharp untouched corners, clean edges with no chipping, and a flawless surface free of print lines, scratches or defects. Any single flaw usually drops the card to a 9.
What grade does a card need to be valuable?
Resale premiums usually start at an 8 and climb sharply at 9 and 10. A Gem Mint 10 can be worth several times a 9 on the same card, which is why centering, edge chipping and surface print lines matter so much before you submit.
Can a card grade a 10 with bad centering?
Rarely. Centering past roughly 60/40 almost always caps the overall grade below 10, even if corners, edges and surface are perfect. Aim for 55/45 or better for a realistic shot at a 10.
How do I know if my card will grade a 10 before submitting?
Scan it. HSA's AI vision measures centering, corners, edges and surface and returns a pre-grade estimate so you can see whether a 10 is realistic before you pay to submit.
What drops a card from a 10 to a 9?
The most common culprits are a single softened corner, edge whitening or chipping, a print line or surface scratch, and centering beyond 55/45. Pre-grade to find the limiting factor first.
Find your limiting factor
Scan your card to see which sub-grade is holding back the overall score — then decide whether it is worth submitting.