This package of three Regular Chipboard Dividers is part of the Memory Dex Collection from Clear Scraps. These shapes include three rectangle-shaped dividers. These laser-cut shapes fit into the Memory-Dex boxes (sold separately) and glide easily over the rail system. These dividers will work with most Rolodex and other systems (sold separately). These dividers can be covered with papers, paints, embellishments, and other crafting materials (sold separately). These dividers measure 4.0" x 3.75". These dividers are made in the USA.