They're pretty wee, they came out in the 2nd edition/Human Sphere era of latex paint power armour and waifish limbs, they look especially small compared to the extremely chonky new Domaru and Tanko.
The old Magister Knights were very similar in size, apologies for crappy photo but you can see they're actually a tad smaller than than modern Keisotsu.
They're smaller, but not to a degree that they couldn't be used in a game. I still use mine for my JSA - the Tanko are for Ikari.
