@Marco-Luti, once you download the file, you need to tell the printer what dimensions you want to print it in by using “page setup” or some similar feature. Tjoek’s map files are super dense and easily support being blown up to twice the size of the OOB map or more.
At 400DPI, Tjoek’s files should printout at the size of the OOB map.
At 300DPI, you will get a +33.3% dimension boost, close to what you’re looking for.
At 200DPI, you will get a +100% dimension boost.
…and so on.  Here’s another thread where I talk about printing (in this case it’s my overlays, but the info still applies)
DM me if you want to share specifics of what you’re looking for.