Package of 35 Brodart Archival Fold-on Book Jacket Covers. They are exact fit center-loading covers; however, the height can be adjusted down for a perfect fit. This Sampler Package includes: (8) 8.5" x 18.5" Sheets, (10) 9.5" x 20" Sheets, (10) 10" x 21" Sheets, (5) 12" x 24" Sheets, and (2) 14" x 28" Sheets. These ARCHIVAL quality covers are completely acid-free and perfect for your most highly-valued books!