non-standard-size comics

I've noticed that Comic Vine doesn't have any information about the many Garfield collections that have been published. There are also no pages for the Pirates of the Caribbean adaptations of the 2nd and 3rd movies. The High School Musical graphic novel Lasting Impressions is also absent.
 
Is this because these comics don't conform to the standard comic size (10 inches x 6.5 inches)? What kind of comics can be added to the database?

all comics that are printed can be added to the database, the database is worked on by users, to add the above mentioned comics yourself just go here to learn how to do it all.