These folders are made from .012 MicroChamber paper or .010 Lig-Free I for paper documents, or from our .010 non-buffered stock for photographic materials. They have closed bottoms and sides with accordion pleats to allow expansion to 1-1/2″. The 6″ front flap has 2 score lines to accommodate this expansion which offers extra protection for unbound manuscripts, documents, or ephemera of various sizes. Letter size folders measure 12-1/4″ x 10-1/4″, and legal size folders measure 14-3/4″ x 10-1/4″ inches. Packages of 5.