Rigid Mailer .037" thick Natural Kraft Chipboard. 17-5/8 x 23-1/2" inside. Mails Large Tabloids, Newspapers and Window Card Posters.

Very happy with quality and performance

Materials are practical and adequate

Sealed end of mailer had to be reinforced with packing tape as it seemed to separate/open up when I filled mailer. Mailer did serve it's purpose,and otherwise I was satisfied with it.

Construction is solid

Just what I was looking for. Only thing, it wasn't quite as rigid as I needed. Still had to buy foam board to put inside to make it sturdier, but I would buy the mailers again.