I suggest using "Thick" Current Bags if you intend on using backing boards, as they are very slightly wider for a better fit.
Case of 1000 BCW Thick Current / Modern Comic Book Archival Poly Bags 7 X 10 1/2
Lot of 200 BCW Thick Current / Modern Comic Book Archival Poly Bags 7 X 10 1/2
Lot of 500 BCW Thick Current / Modern Comic Book Archival Poly Bags 7 X 10 1/2
300 BCW THICK Current /Modern Age Comic Book Poly Bags + Acid Free Backer Boards
50 BCW THICK CURRENT MODERN COMIC BOOK BAGS / FREE SHIPPING / DISCOUNTS ON 100+
100 BCW RESEALABLE Current Thick Comic Book Poly Bags +Acid Free Backer Boards