My goal is to make a cardboard box that has the very unconventional size of 70" x 20" x 12". It's for a piece of furniture but we don't want it to be any larger than that. I couldn't really find any sellers who could make a custom-size box this big (unless you buy in bulk), except for FedEx who apparently will do any large size, but I think the price is pretty steep.

Despite my best efforts researching, the only solutions I found were to shrink a refrigerator box using typical box resizing methods, or to cut a refrigerator box into flat sheets that I then use to build a new box from scratch. But I'm not really sure what's the best way to go about either of these methods since my desired box is so big. Something like this looks good, but I'm not sure exactly how that box was assembled. Any tips? Thanks

My goal is to make a cardboard box that has the very unconventional size of 70" x 20" x 12". It's for transporting a piece of furniture but we don't want it to be any larger than that. I couldn't really find any sellers who could make a custom-size box this big (unless you buy in bulk), except for FedEx who apparently will do any large size, but I think the price is pretty steep.

Despite my best efforts researching, the only solutions I found were to shrink a refrigerator box using typical box resizing methods, or to cut a refrigerator box into flat sheets that I then use to build a new box from scratch. But I'm not really sure what's the best way to go about either of these methods since my desired box is so big. Something like this looks good, but I'm not sure exactly how that box was assembled. Any tips? Thanks