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

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

Perfect thickness for my postcard shipping needs.

A little pricy but seem to be of good quality. They are pretty thin but seem surprisingly stiff considering their thickness. They are also quite smooth. I purchased these for use as stiffeners in padded mailing bags for use in shipping small items. They might be a little smaller than ideal for use in a 6x9 inch mailer but I think theyll probably work out for that OK. These would probably work nicely for a lot of arts and crafts projects too. They measure exactly 5x7 inches and 0.079 to 0.080 inches thick. I hope this info is helpful.

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.

This is hands down the best to pack prints. They are thick and sturdy and keep prints safe when shipping out to my customers. I recommend these backing boards. They are true to size and come safely packed.

Thanks really great

These are very sturdy and perfect for packaging fragile items.

Durable and easy to assemble

These are PERFECT for shipping cards, postcards and other items you dont want to bend. These pieces are actually sturdy and rigid, which is not always the case. They are also pretty lightweight so they dont make your package too heavy. Just what I needed and Ill be back for more.

I needed to use these to send small sized magazines in the mail. I taped two together side by side for a little bit larger surface area and they held up to keep the bubble mailer with the magazine sturdy and unbendable.