It is within scale of regular classics so don't expect something Fort Max gigantic. I personally went for Giant as I find TFC Hercules way too big and clunky looking although it is not much bigger than Giant.
Here are some comparisons with Energon combiners. It is a fair bit bigger:
http://www.toyboxcollection.com/wp-c..._detail_06.jpg
http://www.toyboxcollection.com/wp-c..._detail_05.jpg
Keep in mind that the Bruticus Crossfire upgrades also add a bit of height from standard:
http://www.seibertron.com/images/toy...lossus-152.jpg
Do your research, have a look at all the numerous galleries and make up your own mind.
Here is mine ;)
http://www.otca.com.au/boards/showpo...&postcount=324