Want to know your centering before you send? Use our free tool to check your cards in advance and send us the results linked to your order — so we're ready the moment your cards arrive.
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Enter Your Payment Reference
Already paid and submitted your cards? Enter your Stripe payment reference below to link your centering results directly to your order.
Don't worry if your measurements aren't perfect — our team always double checks all centering measurements as standard procedure during your full professional inspection. This tool simply gives you an early indication and helps us prepare before your cards arrive.
Please enter your Stripe payment reference to continue.
Skip — use tool without linking to an order
📷 Before You Upload — Photo Guidelines
For the most accurate centering results, please follow these guidelines when photographing your card. Don't worry if your photo isn't perfect — our team physically double checks all centering measurements as standard procedure during your full professional inspection. This tool is simply a helpful guide to give you an early indication before you send.
✅ Do This
✅Place your card completely flat on a plain surface
✅Hold your camera directly above the card — not at an angle
✅Make sure all four card borders are fully visible
✅Use good lighting — avoid shadows across the card
✅Keep the camera as straight and level as possible
✅Use a contrasting background so edges are clearly visible
❌ Avoid This
❌Do not tilt the camera — even slightly
❌Do not photograph the card at an angle
❌Do not crop the card borders out of the image
❌Avoid shadows or uneven lighting across the card
❌Avoid photographing through a sleeve if possible
Remember: Even if your photo isn't perfectly straight, our team physically double checks all centering measurements as standard procedure during your full professional inspection. This tool gives you a useful early indication — your final centering grade is always confirmed by us using physical measurement equipment.
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Upload Your Card Image
Drag & drop or click to choose — photograph flat from directly above
Live Results
Left / Right
Left—Right—
Ratio: —
Top / Bottom
Top—Bottom—
Ratio: —
Centering Grade
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Adjust all lines
Drag gold lines to card edges, green to artwork border
Saved Results
🟡 Gold lines = card outer edges | 🟢 Green lines = inner artwork border
Drag any line to reposition — results update live
Outer card edge
Inner artwork border
⚠ Remember: Even if your centering meets the Grail 10 threshold, your overall grade is determined by a full professional inspection — our team examines every card under specialised high-tech microscopic analysis equipment checking corners, edges, surface and print quality. Centering is just one of five grading categories, and we always double check centering ourselves as standard procedure. This tool is a helpful guide — your final grade is confirmed by us.
Ready for the full grade?
Submit to Holy Grail Grading
Centering is just the start. Our full professional microscopic inspection covers all five grading categories and gives your card the grade it truly deserves.
Your centering results have been sent to Holy Grail Grading and linked to your order. Our team will have your pre-grading data ready the moment your cards arrive.