The current state of mecha, giant robots in fenspace.

[robkelk]

But nothing with the bigger mechs?

The building of Gunbuster 3 is forbidden by the Gas Giant Preservation Act that forbids the various terraforming projects from raiding the planetary rings for ice boulders. (Besides, the Browncoats kind-of need Jupiter where it is.)

As for what exists between 30' mecha and that extreme... no data.
--
Rob Kelk
"Governments have no right to question the loyalty of those who oppose
them. Adversaries remain citizens of the same state, common subjects of
the same sovereign, servants of the same law."

- Michael Ignatieff, addressing Stanford University in 2012