Let’s put the size of The Backrooms into perspective.

Our home planet, Earth has a surface of 197 million square miles (510 million square kilometres).

By comparison, The Backrooms is 600 million square miles (1.554 billion square kilometers). It is approximately 3 times the size of Earth’s surface!

The generally accepted lore is that this size refers to only Level 0 ― but level 0 also can shift and alter in perspective. And if you consider (in the extended lore) that other levels are of varying sizes and that all levels haven’t been discovered, then the actual size of the entire Backrooms could be infinite (in so much that the actual size could not be calculated or comprehended).

No matter which version of the lore you follow, it makes you wonder if anyone has ever reached the edge of Level 0. And if so, what is at the end? Perhaps the void? A wall that cannot be no-clipped through? Or maybe The Backrooms is spherical like the Earth and you’d just go in an infinite loop if you kept going.

But why 600 million miles? It’s a very specific number. I think for that one you’d really just say it’s either an approximation or a minimum. After all, the only person who could answer that in our world is the writer of the original text on 4chan. And seeing they’ve never come forward, they probably just chose a random number. Or they liked the number 600. Who knows. That person never would have thought when they wrote that text, it would be discussed and expanded on for years to come!

Whatever way you look at it, the size of The Backrooms is certainly mind-blowing!