The size of hell doesn't really need to be stated, as on the map it shows exactly how big it is, below it shows the Universe according to the map and Hell covers all around the Universe in a ball shape, and the same map has not changed for Dragon Ball Super, being used the same, so hell is Universal size, just do the calculation and such
Right here you can see that hell is circled in red, to highlight, note that its size is just like the Universe and if not even bigger than it.
More detailed map of hell
Well here we have the same map you use in the guides and interviews, where hell is below the clouds, which is the size of the Universe if you observe it well, just calculate the size and that's it, it is not necessary to remove hell as being Universal
Can we say the same for paradise, where there are countless people who die and are born, in addition to not just humans, but aliens, and others, I think with me, how will a planet fit billions or even more souls?
Said right here where all living beings go there, it is necessary to be the size of the Universe to fit so many people
And, no my friend, paradise is not the size of a planet as you want, it needs to be the size of the Universe to fit so many people
Now let's go to the Daizenshuu where Akira toriyama makes it clear that he is the official DB guide and he still thanks you, all things that are in it are questions answered by Akira toriyama, he supervised him all
As you can see, Akira toriyama claims that it is a Dragon Ball encyclopedia, so yes it is canonical and all things taken from them are from the work itself, both manga and anime, there is no point in coming with your denials, hell and paradise is the size of the Universe, unless someone else refutes it being canonical here.
https://www.kanzenshuu.com/translations/daizenshuu-7-toriyama-intro/
As you can see, Akira toriyama still reinforces about the databook that is taken from the manga
https://www.kanzenshuu.com/translations/daizenshuu-1-toriyama-intro/
Right here it says exactly "Dragon Ball world guide"
https://www.kanzenshuu.com/translations/daizenshuu-4-toriyama-intro/
Do you need Akira toriyama to come down on his knees and say that he is canon? I noticed that this CRT shit is happening every single day, DB doesn't have a minute of peace, every day there's someone wanting to downgrade the verse, I think a rule would be needed to not try to downgrade the verse, before new tests.