The total length of the sword as is 130cm (1300mm). There's a hole going all the way through the interior of the rebellion designed for a 115.8cm (1158mm) support rod of 1cm (10mm) thickness. If you want to go that route, you'll likely have to buy a bigger one and cut to size. Alternatively, I have also included a simple 3D printable 15.8cm dowel insert as an option, so you'd only need a 100cm (1000mm) rod, which is a more common size. You'd shove it in and push it all the way to the tip of the rebellion, and then just use the 100cm metal rod on top of that.

For easier printing, I've added a 3mf file that you can open with OrcaSlicer as a suggestion on how to print and split the model, there are some errors in the model (I am very much NOT a professional 3D artist) that orca is able to deal with relatively well, but other slicers had trouble with, as such, OrcaSlicer is what I recommend to slice and print this model.