They are 7-1/8" by 10-1/2" and will fit all standard silver age boards.
100 SILVER AGE Comic Backing Boards - Silver Age 178x 266 mm Coated Acid Free
Ultra PRO Silver Size Comic Bags (100) | Silver Age | Comic Book Storage
100 Silver Age Comic Bags & 24pt Backing Boards+Premium Comic Storage Box Set*
100 Silver Age Comic Bags & 24pt Backing Boards+Premium Comic Storage Box Set*..
100 Silver Age Comic Bags & 24pt Backing Boards+Premium Comic Storage Box Set* .
100 Silver Age Comic Book Backing Boards Storage INC. 2 FREE COMICS
