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

Perfect to ship inside my envelopes with my stickers to keep them from bending.

I needed this to protect some prints that were 5x7 inches, but the cardboard, while sturdy & decent quality, isnt exactly 5x7. They are slightly smaller in both width & height, so doesnt work for my purpose. Really annoyed.

These are very sturdy and perfect for packaging fragile items.

I bought the 5x7 size and they are a must buy, seriously amazing quality!! I use these to ship paper products for my business and I am SO thankful to have found these after two years of a bad experience with another Amazon seller. For some reason this product is hard to find on Amazon. My photo shows the quality difference side by side. The old ones always arrived wrapped in zip ties which left them badly bent every time. These new ones arrived neatly stacked in a clear bag that kept them perfectly straight. They are very sturdy too. I never leave Amazon reviews but these will make my life so much easier. Will be ordering a lot more today because I never want to run out!

Super good quality and perfect for adding backing for flimsy envelopes Package came in a neat stack, easy for storage Fits perfectly in my A7 envelopes and match the kraft paper

I used these for my business and mail stickers in between. Since I started using these, I havent had any issues with mail bending. These are thicker than I thought!

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.

These are very nice for shipping postcards and such for ebay purchases! Would also be great behind photos. They are very supportive....do not bend easily. Much better than another brand I bought in the past. Will be buying 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.

Smaller than I thought they were