HAKZEON 100 Pack 12.7 x 9 Inches Stay Flat Mailers, White Cardboard Envelopes Long Side Opening Self Seal Paper Mailers for Documents, Photos, Letters, CDs

We use these in our shop to ship out cut vinyl and printed stickers. They are rigid, but still kind of floppy, so if you are mailing things like photos or things that absolutely can't get creased, then this might not be the one for you. For what we do, we ship hundreds of these and haven't had any issues with them. We actually cut them in half lengthways and tape the center up to make them two long and narrow mailers and they work great for that. I'll keep buying these and using these, very happy with them.

This states on the very first line that these are “Rigid Mailers”, they are NOT RIGID at all. They have a lot of flexing to them. This is the first time I thought I would try these out.I redid this post to update….. I still agree with what I left above but, they have worked out great for what we are using them for. They are not rigid like we would have like but we have had no complaints from our customers about them. Since the first review we have ordered 3 more times I believe.Just remember that these are NOT RIGID if you are looking for stiff, rigid type. They are very flexible.

These are shockingly flimsy! I honestly think these are the thickness of copy paper. Will be returning, very disappointed. Do not buy! Any good reviews have to be fake. Catalog envelopes are sturdier than these!