A little cheat sheet I melded from two different sources that I found. It will get you in the ‘Ball Park’, but, I am no pitcher.
For an accurate, industry excepted grade use CGC Comics or similarly reputable company.
In my endeavors to understand the comic book grading process. I put together this little PDF to help me pre-grade books. [ Art_of_Comicbook_Grading ] Like I always say; “If you’re not fact checking your information, you’re path is already sealed.”