Coiling Dragon's Yulan Continent & Plane size

In the Yulan plane, the Yulan continent itself actually took up only a small portion of the space. From north to south, the size of the continent was roughly just twenty thousand kilometers. Even from east to west, which was much longer, the distance was only thirty thousand kilometers or so. Compared to the seas, there was a huge difference.

Forget about the South Sea; the South Sea could completely be described as endless.

Ten thousand Yulan continents would take up less than a tenth of the South Sea.

The North Sea, by contrast, was much smaller, but it was still much larger than the Yulan continent.

Book 12, Chapter 36

His own homeland, the Yulan continent, was only thirty thousand kilometers in size.

Book 14, Chapter 2

The Okerlund Plane. The size of this entire plane was comparable to the Yulan Plane.

However, 99% of the surface of the Yulan Plane was covered by water! The South Sea, in particular, took up a region that was a thousand or ten thousand times larger than the Yulan continent! But the Okerlund Plane was different. A large majority of the Okerlund Plane was covered by land!

The Okerlund Plane consisted of two vast continents.

They were the Fogdeep continent and the Beastgod continent! These two large continents both had a circumference greater than a hundred million kilometers. Aside from these two continents, there was only the endless sea.

Book 20, Chapter 33