Windyun 2 Pack Large Poster Storage Bag 48" x 36" Bulletin Board Holder Art Portfolio Case PVC Art Portfolio Container Bulletin Board Storage Box with Pocket for Classroom Teacher Organization (Blue)

Yes they do provide the measurements, but it's hard to picture these bags. They are comically large and for me were kind of hard to work with at first. The thickness of the material is similar to that of the thinest water bottle. I got these to store jumbo sized mylar balloons in them, and so far really good. Any plans to carry it around like a suitcase are a no-go, but it's great for stationary storage and retrieval, and it's large enough that most of them can be kept flat.

Understand that these are going to fit your poster storage needs, so long as you're not storing anything above 27x40. Their PVC build is strong, the borders & straps aren't going anywhere, and you can definitely fold these up to a much smaller size when not in use. That having been said...The actual measurements of these are 45x36 (37.5 when the tops aren't closed). The product photos mention a "zipper design", but there are no zippers here. They're completely transparent. They won't come with anything in the way of a solid, backing board to secure the contents. The chemical smell coming off of the set is probably going to require a few days in the garage to clear (and I'm not usually sensitive to these sort of smells). They're heavily creased from the way they're packaged. And I wish there was a single bag option, as I suspect most people won't need 2 bags.Ultimately, if you can secure a sturdy and large piece of cardboard for strengthening the interior, and know that the 45-inch length meets your needs, then these are a solid option. But I can't readily recommend a product that's falsely advertised.

I fit every poster I had in my classroom into one bag! Another teacher walked in and said, “Wow, where did you get that?” I gave him my 2nd one. We are both very happy! Easy to see through and zips closed. But like I said, it is very large.

this thing is actually gigantic. I recommend buying one because you can fit a lot in it and I also put an old piece of cardboard box in it to give it some stability but this is perfect for people who have a lot of posters and are moving them back-and-forth to college and need a safe place to store them rather than rolling them up, especially if they get sticky tape on them.

These plastic bags are huge. But perfect for my son's artwork as they hold the big pictures. Now the artwork will be protected forever. I have an extra as I bought a set of two. The second one will hold my other son's artwork as I am sure he will be happy with the clear bag. Just what I wanted. Very happy with this purchase.

The smaller size of these is made with much heavier material. These are made from very thin and flimsy material.

Very big and holds all the big teacher charts, water proof for sure. But not sturdy enough for things not to bed. I tried to add a piece of foam board to help

Great for storing poster board and cardboard for supplies.