These Fileback dividers are extended 1" in length, scored for folding and come with a pre-affixed 1" bonded fastener. Fold on score line to form a flap and slip divider over existing fastener in folder. The next divider is attached to the fastener on the first divider , and so on. Add as many sections as you need. Chart material is fastened to each individual divider giving you immediate access to easily add or remove sheets. Made from sturdy 11pt manila stock. End position overall size with extended flap: 8 1/2"W x 12 1/4"H, Side position divider size with extended flap: 9 1/2"W x 11"H - Both are 8 1/2" x 11" when installed. 100 per box.