If it's a tinkertoy style model or a drawing within a book, it's made up BS. There are no books large enough to actually show it to scale.
Edit: For the pedants of the world, I have added "(Some)" to my sentence. "Not all accurate scale models" of course. Some are even larger than that.
2nd edit: Folding another comment in here as well that I deleted :
https://en.wikipedia.org/wiki/Solar_System_model
The Sweden solar system scale is listed as 1:20,000,000. Others have used a different scale and been fit into less than an entire country. There are several around the world.
In York, it is spread across 6.4 miles:
https://astrocampus.york.ac.uk/cycle-the-solar-system/
There's another in Greater Boston:
https://foursquare.com/eric_odea/list/museum-of-science-bost...
Sweden was, last I checked, larger than a city block.