At the comic book store I went to they had 4 sizes of the boards.
current 6-1/2"x10-1/2"
Silver age 7-1/8"x10-1/2" (this is what I purchased)
Golden age 7-1/2"x10-1/2"
Magazine 8-1/2"x11"
I ALMOST got the magazine size but didn't almost wish now that I had.
Having a hard time trying to figure out how to fold the fabric to fit on
the silver age boards.