200 Pack 5x7 Corrugated Cardboard Sheets for Mailers, Flat Packaging Inserts for Shipping, Mailing, Arts and Crafts Supplies, Dividers, DIY Projects, 2mm Thickness

True to size and great for packaging items or putting backing in a frame

Thanks really great

They came warped and not flat. Extremely thin. No protection what so ever.

You get a lot for your money. Perfect to use with mailing.

Idk who mixed this batch of graham crackers, but they taste like cardboard

I’ve ordered custom cut corrugated cardboard before, and the quality of this product far outshines even that. These are thin but still incredibly sturdy and hard to bend! And just as a FYI, i would NOT recommend people placing these inside envelopes or flats, since these board are so stiff that your letter will be non machinable by postal services. Since letters and flats are required to have a certain percentage of give/bend-ability, your letters may very well arrive to someone bent and at worst case destroyed. ** parcels/packages/bubble mailers are okay though **

These are exactly what I needed to ship out paper goods without them bending in the mail. I am so glad that they came undamaged and better than I thought theyd be. Will purchase again.

I purchased these to use as inserts in a 6”x10” padded envelope for my online store. I need to ship something flat but that I don’t want to bend and these are perfect! I love that they have a smooth finish so they skip into the envelope relatively smoothly. Highly recommend if you’re looking for something similar.

I Love these :D they fit inside my 5x7 envelopes :D

I’ve bought these a couple times for my art students. They are a great size. Still find all cardboard on Amazon too expensive for what it is but I don’t have alternative options at the moment so I guess they get my money. I do find them very useful.