I'm building a MOC to scale with the Saturn V set and am having trouble figuring out how tall the 1st stage engines are but the entire thing would be really helpful! Thanks!
On the box the entire rocket is shown to be 100cm. I just measured the first stage, that is 40,7cm.
Else you can go to service.lego.com and download the instructions aand start counting/calculating (the studs face in different directions, so you can't just count).