https://brandtbox.com/product/16-x-12-x-6-kraft-deluxe-literature-mailer/
16 x 12 x 6" Kraft Deluxe Literature Mailer | Brandt Box
Feature protective side flaps and front outside tuck closure.
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https://desktopindustrial.com/product/18-x-12-x-3-kraft-literature-mailer/
18 x 12 x 3" Kraft Literature Mailer - Desktop Industrial
18 x 12 x 3" Kraft Literature Mailer
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https://desktopindustrial.com/product/16-x-12-x-4-kraft-deluxe-literature-mailer/
16 x 12 x 4" Kraft Deluxe Literature Mailer - Desktop Industrial
16 x 12 x 4" Kraft Deluxe Literature Mailer
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https://www.boxesofhouston.com/shop/22lm-11341034214white-11-3-4-x-10-3-4-x-2-1-4-literature-mailer-white-50-bdl-2089
11 3/4 X 10 3/4 X 2 1/4 LITERATURE MAILER WHITE 50/BDL | Boxes of Houston