[articuzwolf]

Originally Posted by Kameruka

I wonder how big the airships in the show?

At first glance it can be as long as 1km but some are slightly smaller.

Quasi-Bahamut Class Floating City
Composed of two ships in the middle, and 3 ships on each side, front and back, for a total of 8 ships. Length overall is over 7 kilometers. Has residential, commercial, administrative, industrial areas, and even embassies. Has all the facilities needed to function as a country.

http://kyoukaisen.tumblr.com/charaprofiles

7 Kilometres