CGC Help Center

For answers to frequently asked questions about CGC membership, submissions, grading and more, scroll below. To contact CGC Customer Service, click here.

Help Topics

About CGC Grades

What are your grading standards for comic books?

Derived from the Overstreet grading criteria, the CGC grading standard was first developed by taking a consensus of grades assigned to a variety of comic books from a nationwide pool of experts, including comic book dealers and leading collectors. CGC realizes that comic book grading is an art that develops from years of experience, and while our consistently applied standard of grading eliminates much of the subjectivity and risk, grading itself is not an exact science. That's why it is reasonable to expect that slight variances may exist between CGC grading standards and the standards of some dealers and collectors, as well as comics that have been previously graded by CGC since its inception. CGC strives to consistently apply the most accurate and consistent grading standard to assure that the grades of comic books are properly represented to the widest possible audience. To learn more, visit

If I have a collectible graded by another grading service, will it receive the same grade with CGC?

When submitting a collectible that was graded by another grading service, there is no guarantee that the grade assigned by CGC will be the same as the grade assigned by the other grading service.

Still not finding an answer? Contact CGC Customer Service at 1.877.NM.COMIC, 941 360 3991 or