Oh, hey. The new Transformers: Historia actually gives solid heights and weights for everyone.

Well, not everyone

Only Arcee, Optimus, Megatron, Starscream, and Windblade.

Nice to see that the whole "Females have ridiculous weights" thing applies to giant robots, though.

All the dudes: 20+ tons

Arcee? 15 tons. Windblade? 8 tons.