Stayflats Lite Mailers .018" thick white paperboard.
13-1/4 x 10-3/4" (ID). Peel & Seal.

They worked out wonderfully! I used them to slip my 8 x 10 art pieces that I sold at a conference last fall. The people were so thankful that I had these to protect the prints. They are light weight but not too light. Just right for situations like what I had.

These were used for purchased art work protection at a large conference. As one who was/is unfamiliar with the thicknesses, I found these were a bit on the thinner side but it worked out beautifully nonetheless. They still protected the art pieces and people were very happy I had these envelope mailers.