I decided to pick one up out of curiosity, its actually about as long and wide as my hobbyboss 1/48 KV-1, and almost as tall, that's just comparing on sprue though.
Hull Length: about 15.1cm
Width: about 7.5cm
Height to top of turret: about 5cm
Once you stick it on a 2mm MDF base most 28mm models come to the top of the main hull, the gun will need modifying though, the front half is very thin
I think its 1/54 scale