[Sergeytov]

Size isn't about a number of rooms. It's not about how many coded rooms there are, or even how big the IC 'world/universe/dimensionverse/whatever' is in canon. At least from the point of view of most players.

(Disclaimer: Size does matter for code/database/processing purposes in many cases, but I'm not touching that part in this post.)

Say I'm playing a fantasy game where few characters have access to high speed transport. The entire world is about the size, of, say, Texas. Let's also say it takes a week to travel across the entire game world due to whatever restrictions you have set up (timers to limit how fast one can move from room to room, fatigue, etc). We'll call this World A.

In our second example, let's say the game area is the solar system we live in. It takes five hours to travel from the two planets furthest part at a given time. We'll call this World B.

In the perception of most players, World A is 'bigger' than World B in terms of travel, since it takes longer, even though World B is bigger in terms of the volume of area it covers.