Prism Pastel Catalog Catalog envelopes are referred as open end envelopes, that is one with the flap on the short dimension. Some common uses include an annual report, brochure, sales literature or a selection of printed materials.  Prism colors are pastel colors for your matching letterhead and envelopes All colors are recycled and acid free. Quantity Carton Discounts Available 1-5, 6-10, 11-15, 16-20, 21-25, 26-30, 31-35, 36-40  9 x 12 - 28#  Prism Open End Catalog 500/Case 10 x 13 - 28# Prism Open End Catalog 500/Case