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 and Boards 184 x 267 mm Crystal Clear
100 Silver Age Comic Book Backing Boards Storage INC. 2 FREE COMICS
100 SILVER AGE Comic Bags 184 x 267 mm Crystal Clear
100 Silver Age Comic Book Backing Boards Double Gloss Acid Free Archival Safe
