Use this to send flat, bulky materials or multiple small items like coins, catalogs and jumbo cards. Flap is on the short side, helping to keep things from falling out after opening. Also called a catalog envelope, it actually comes in 39 sizes from tiny to huge, in white, traditional kraft, and array of colors for special impact. Available with moistenable flap, some with self-stick Peel and Seal. Also see the Open Side collection. You're off to a flying start with our traditional airmail envelopes. The sky really is the limit as Envelopes.com has many airmail styles including the popular #10 and #10 window sizes. Each envelope features the easily-recognized traditional red and blue airmail border and the word airmail in three languages. Let your mail travel in style!