One Piece Card Grading in the UK
From Manga Rares like the OP05 Gear 5 Luffy to Tournament Promos from the Treasure Cup, grading with Imperium ensures your treasured cards are authenticated and preserved in our UV-protected slabs.
Unique artwork, created by artists
Crystal clear UK made slabs
Free detailed reports for all graded cards
No Up-charges
Hand-crafted One Piece art made by real designers, not AI
All our One Piece art labels are hand drawn by our group of talented designers to perfectly match the design of your cards. No AI used here!
Standard Imperium Labels
Art Labels
Set Labels
Imperium Reports as standard
Every One Piece card graded with us includes a detailed report at no additional cost. You’ll receive subgrades, defect call-outs, and a clear summary of our rationale—giving you complete transparency into how your card achieved its final grade.
*Our reports are still being improved, but we wanted to give you a sneak peek at what we’ve been working on.
True 'Imperium' 10
Our top grade is rare on purpose. To distinguish truly flawless One Piece cards from a standard Gem Mint 10, we reserve the Imperium 10 title for examples that achieve perfect 10s across all subgrades. While a Gem Mint 10 allows for 55/45 centering, an Imperium 10 demands a strict 51/49 criteria. We believe this elite grade should only be awarded to cards that represent the absolute pinnacle of quality, making them a prized centerpiece in any collection.
Read more about the 'Imperium 10 Red Label'
Human designs and artistry
Our art labels are not just designs—they are hand-drawn originals by real artists, extended beyond the card window for a true display-grade finish. We stand for authenticity: zero generative AI and full creative credit. Every label is a genuine collaboration between Imperium and our talented group of artists.
Consistency you can calibrate to
We ensure absolute grading consistency through daily, rigorous procedures. Our graders adhere to the strictest protocols, including:
- Fixed Calibration Checks
- Adherence to Reference Standards
- Inter-Grader Audits
This commitment to daily checks delivers unmatched market stability. It translates directly to significantly tighter population curves, ensuring fewer surprises, and providing grades that you can price and trade against with absolute confidence.
Stackable, Hyper-Clear, UK-Made Grading Slabs
Designed, engineered and produced in the UK for unparalleled optical clarity and premium display, our slabs are built to protect your One Piece cards for a lifetime.
- Visual Quality: Showcases card colours vividly, with a non-hazing finish. We use only display-grade materials—no lightweight or foggy plastics.
- Durability & UV Protection: Features enhanced resistance against scratches, scuffs, and UV.
- Functionality: Purpose-built to stack securely, without causing scratches, for easy collection management.
- Security: Includes robust anti-tamper features for ultimate peace of mind.
Pricing
How much does it cost to grade a One Piece card with Imperium?
We have designed our grading tiers to offer a balance of speed and value, ensuring that whether you are securing a high-value grail or protecting a personal favorite, there is a service level built for your needs.
Platinum
£30Art label
+£3
Launching Soon
Gold
£25Art label
+£3
Silver
£15Art label
+£3
Bronze
£12Art label
+£3
Platinum
£30Art label
+£3
Launching Soon
Gold
£25Art label
+£3
Silver
£15Art label
+£3
Bronze
£12Art label
+£3
Platinum
£25Art label
+£3
Launching Soon
Gold
£20Art label
+£3
Silver
£12Art label
+£3
Bronze
£9Art label
+£3
Platinum
£25Art label
+£3
Launching Soon
Gold
£20Art label
+£3
Silver
£12Art label
+£3
Bronze
£9Art label
+£3
*All prices shown are per card
*All prices shown are per card
The Imperium Grading Journey
Total transparency from intake to dispatch. Follow your cards through our rigorous multi-stage process with real-time alerts.
Arrival & Intake
Your package is opened and verified. We take intake photos and check cards against your order. You'll receive an email notification the moment we begin. Note: Unpaid cards are returned ungraded.
Stage 1 Grading
Initial assessment is completed by our first specialist grader. They input all data and scores into our secure system. We’ll notify you by email as soon as the grading starts.
Stage 2 Grading
A second, independent assessment is conducted. To ensure a non-biased, consistent result, the second grader has no knowledge of the previous scores recorded.
Finalisation
Our Head Grader reviews both reports for accuracy and confirms the final grade. You will receive an email once your order successfully passes through this final evaluation.
Label Production
Your chosen label (Standard, Retro, Set, or Art) is printed, quality checked, and prepared for the final encapsulation phase.
Encapsulation
The card is ultrasonically sealed in our premium, UK-manufactured slab—engineered for clarity and protection.
Final Quality Check
A final inspection of the finished slab ensures it meets the "Imperium Standard" before it leaves our facility.
Dispatch
Slabs are securely boxed and postage labels created. You'll receive a final email with tracking information and an expected delivery date.
FAQs
How do I submit my cards?
Once submissions open, you can create your account and immediately begin the process. To submit your cards, simply select them from our database, finalise your label options and shipping preference, and then securely package and send your order to us. We handle everything from there. (Look for detailed packaging guidelines coming soon.)
Why should I get my card graded?
Grading is the ideal way to permanently encapsulate your favourite cards, protecting them from physical damage, environmental wear, and deterioration. The secure, tamper-proof holder ensures your card remains in its current condition for years to come.
Grading with Imperium also provides an unbiased, standardised, and recognised rating of your card’s condition. This eliminates doubt regarding a card’s authenticity and precisely measures its quality.
How long does it take?
The turnaround time for your submission is determined by the grading tier you select. Our service options provide a range of processing times, from as quickly as 2 days up to a maximum of 15 days from the day we receive your cards.
How much does it cost?
Depending on the tier option you have selected will change the cost of your submission.
What TCG can I grade with Imperium?
Currently we will grade Pokemon TCG and One Piece TCG. But watch this space, we will be adding more of your favourites in the coming months.
How do I become an affiliate of Imperium Grading?
For affiliate information and sign up form please follow the link here.
What do I do if I have a problem with my order?
If you have any problems with your order please contact us on our help email [email protected] or fill out the form on our contact page.
Do you grade custom or proxy cards?
We do not grade custom or proxy cards, only cards from an official TCG will be graded at this time.
Do you grade miscuts, errors or factory defect cards?
We offer miscuts, errors and defect card grading as part of our service.