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Thunder Cards Grading

A simplified accurate expertise

The cards you send us are systematically authenticated. We follow a specific set of grading criteria to guarantee a reliable and secure environment.
Glasses

An in-depth review

Our experts are committed to certifying the authenticity and condition of every card with the utmost care.
Grade 10

A professional grading

We are fully dedicated to giving your cards a transparent and fair grade.
Grade 10

Improved pre-grading process

We write a unique certificate for each pre-graded card specifying the evaluation of the card and guaranteeing its authenticity.
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Thunder

Improved pre-grading process

We write a unique certificate for each pre-graded card specifying the evaluation of the card and guaranteeing its authenticity.
Authentication image
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Grading grid

Our evaluation criteria

Different criteria are taken into account during the evaluation of the cards by our experts:
1
The centering:

It is determined by the yellow, black or white (for Japanese cards) border around the card.
2
Surface:

This grade focuses on the card's sharpness and conservation quality, which decreases in case of damage (scratches, fading, etc.).
3
Edges:

This applies to both the front and back of the card.
4
Corners:

A fold, white spots, a poorly fitting cut or an ink stain will lower the final grade.
Our pre-gradation expertise is ideal for quickly and easily purchasing cards that you want to send for grading after your purchase! We work with many partners in Europe to offer you easy access to their grading services!
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Our Grading Grid

Precise cards grading

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Only cards with a grade of 6 or higher will be accepted on Thunder
Red check
Cards with a final grade lower than 6 are currently not accepted
Blue check
Only cards with a grade of 6 or higher will be accepted on Thunder
Red Check
Cards with a final grade lower than 6 are currently not accepted
Grading note
Absolutely flawless card.
Blue check
Grading note
Fully mint card with a minor flaw or printing defect.
Blue check
Grading note
Mint card with some minor slight flaws.
Blue check
Grading note
Mint card with several minor flaws with no impact on its overall condition.
Blue check
Grading note
The card shows a sign of damage degrading its overall excellent condition.
Blue check
Grading note
The card has several wear and tear flaws degrading its overall condition.
Blue check
Grading note
The card has at least one major defect or too many minor defects and evidence of damage, which significantly deteriorates its condition and makes it impossible to sell..
Red check
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We collaborate with many grading partners in France and Europe. They help us to refine the evaluation of your cards! If you want to buy or sell cards and already know which partner you will grade them with, we can adjust our pre-grading to accurately reflect the rating of the partner in question!
Download the Partner Grading Kit
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Save time by purchasing authenticated and pre-graded cards

How do I evaluate the condition of my cards?

Assessing the condition of a card is a meticulous process. While professional expertise allows for a high level of accuracy, it is possible to perform an initial examination yourself, with no tools.

We have compiled a practical guide that will help you estimate the condition of your cards before they are shipped and offered for sale.
Download the Guide
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Save time by purchasing authenticated and pre-graded cards

Make the most of your graded cards by reselling them at the best possible price

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Sell your graded cards on Thunder. We have defined an eligibility grid with our partners that allows you to know the minimum score allowed on Thunder for cards graded by the partner in question.
Grading system
Download the complete gridDiscover the Partner Grading Service
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