Prestige Alvin Art Envelope 14 X 17 - Pkg of 6 Once you have a finished document or piece of artwork that you want others to see, you need a good way to protect it from damage. Dirt, moisture and even dust can ruin a work easily. If you won't want to present a work that is smudged with dirt and ruined with moisture, use one of these clear vinyl envelopes to seal the work away from harm. The .010" vinyl is heat sealed on three sides. Use the fourth side to insert your work into the envelope. A black, acid-free paper insert is included in each to allow for a more formal look for your work. The 14 x 17 size of each envelope is designed to fit standard art sheets and portfolios to allow you to show off your most important works.