For what I've seen it's not very big. If you install a Tor browser and use https://dark.fail https://dark.fail to copy-paste some onion adresses you should have

For what I've seen it's not very big. If you install a Tor browser and use https://dark.fail https://dark.fail to copy-paste some onion adresses you should have some experience of it. If you plan to do something "dark" you should investigate further, but for the curious this is enough.