Navezgane is a pregenerated world and does only exists in 6k. In the past it had a size of 4k.
There is only one pregenerated World that has the size of 10k: PREGEN10k
Bigger sizes have to be generated by the player.
On the first page is the link.
Navezgane A18 B149 Full Map with Names & Roads is the Map with the latest changes. So you can say it's the same like A18.1 B8.