Question: how big are the transformers?
Answer: For the Autobots, the cars range from 15 feet like Jazz and Sideswipe to 18 feet like Crosshairs and Bumblebee in The Last Knight. Ratchet (an ambulance) and Ironhide (a larger civilian vehicle) stand at 20 and 22 feet tall, respectively. Optimus Prime, a big rig truck, is 28 feet tall.