Pratt MJ-3 Self-Seal Stay Flat Mailer, White, 9" x 11 1/2" (Pack of 100) (2.Sets)

They changed the quality of this mailer in the most recent shipment i purchased, it was decent previously now it's only marginally better than usps mailers - meaning there is absolutely no rigidity nor does it stay flat. It will not protect your contents such as magazines/comic books against bending or anything.Have been a long time repeat customer, sadly this is another example of a company taking something that worked and try to cut quality, resulting in garbage. I will not be buying this brand anymore going forward.

I've used all 100 of these mailers and I'm ordering more. The mailers are rigid enough that I don't worry about the contents bending during shipment. The adhesive on the flap is very sticky. If you forget something and try to re-open the flap, it will rip the cardboard before the adhesive gives way (that's a good thing). With cheaper mailers I have had to use packing tape to seal the flap because the adhesive didn't seem very trustworthy. With these I have no concerns. I use pouches to adhere my labels to the front of these mailers, and they also stick well to the surface. I have zero complaints with these mailers. I'm reordering more, and will continue to do so in the future. Highly recommended.

These are great for mailing out 8x10 photos, discs or even small packages. We put them in poly bags and on occasion will stick a cardboard piece in the mailer just for added support but it already feels very firm. They feel like it would take quite a bit of beating or deliberate bending for it to get ruined. I never really tried though :)I've been using these mailers for about 7 years now and will probably never use anything but these.

I have been using these for 10 months to mail 8x8 sheets of vinyl decals all over the world. Hundreds of packages - Not one has arrived bent or damaged. They are a thinner paperboard than the kraft envelopes I was using before, and they do have a "give" to them (think slightly bendy), but they are no less sturdy. The white exterior looks very professional and holds a shipping label better than the kraft paper surface ever did.

Exactly as described. These are super stiff mailers that a standard 8.5"x11" piece of paper fits perfectly in. I was worried I may end up bending a corner or two trying to get pages in due to the snug fit, but nope - they drop in quite nicely. I was also worried about only being able to fit 1 or 2 sheets, but I've been able to fit 5-7 at a time no problem (I haven't tried more yet).Note the USPS considers these packages, and not envelopes since you can't bend them (which is kind of the point). So they cost more to ship.

These are amazing for shipping the custom paintings on watercolor paper that I send to people. Never any damage. I throw some extra cardboard in there with it just in case, but the envelopes themselves could probably do the trick on their own.

FINALLY I found the mailers I need to start selling and shipping prints worldwide! These are durable and clean and perfect. I can mail art prints without a cardboard insert. The only reason I withheld a star is because in the description and in the questions section it is stated that an 8.5x11in print easily fits into this mailer. I can fit them but it sure isn't easy. I am happy with them but had I known this, I would have gone with a larger size.

Great as always and came on time I use these to ship prints from my shop, sturdy enough to protect prints from bending with no extra cardboard required