Pastel Organizer Tray from Richeson is designed to fit the Roz Box, Roz Box 2, Roz Bag or the ArtBin Pastel 3 Box. Stackable tray holds 34 pastels and has a center grip for easy handling. Tray measurements are 16 3/4 x 6 7/8 x 7/8 inches. Individual pastel spaces within the foam insert measure 7/8 x 3 1/4 x 3/4.