These boards are designed to be used behind a comic book in the Guardhouse Shield Current comic book bags (Item 668116 and 668158) and provide a sturdy backing that protects from accidental creases and folds. Size: 6 3/4 x 10 1/2" 100 per pack Coated with calcium carbonate on one side. Size: 6 3/4 x 10 1/2". Sold in Packs of 100. Case Qty: 500 .