Ambassador 307701 Double Wall Strong Flat-Packed Shipping Box 18x18x18 Inches (457x457x457mm) - Brown [Pack of 15] | Heavy Duty Moving & Storage Cartons for Ecommerce, Warehouse & Home Organization

Yes there's aren't the cheapest boxes, and if they were sold at their "rrp" they would be exorbitantly expensive however they are very high quality and definitely worth the little bit extra when compared to cheap boxes. Not quite sure why the picture shows loads of different size boxes as you will receive 15 457x457x457 boxes.The boxes, as you would assume, arrive flat packed bound with a couple of strong straps, the cardboard is (for lack of a better way of describing it) pre scored so folds in the right places. With a few pushes and a bit of tape your boxes are complete. The cardboard is thick and high quality so you have confidence when you're loading them up. We filled several boxes most of the way full of books and there was no hint of them coming apart, the only reason I didn't fill them to the top was the worry that the tape holding the bottom together would not stand up to it. And the fact that they were super heavy.After we finished using them for our house move we gave them to my parents for their move, apart from having to scrub out the old contents list they held up perfectly and have been put aside for a later move.