How big is Saturn V?
Saturn V: 111 m (363 ft). Measured as height — full stack on the pad (363 ft).
Source: Wikipedia — Saturn V
Where it sits
Among the 14 vehicles & ships on this page Saturn V ranks 6th from the top by size. The largest in the group is Emma Maersk at 397 m, which is 3.59× the size of Saturn V, while the smallest, Tesla Model 3, is 4.69 m.
Stand an adult of 1.7 m beside it and the ratio is 65.1×: you would need 65 people stacked head to foot to match its size.
In everyday distances
A football pitch is about 105 m long. Saturn V is 1.05× that, which puts it at 1.1 pitch lengths from end to end.
Walking at an easy 1.4 m/s you cover 111 m in 79 seconds. A jet at 900 km/h covers it in 442 milliseconds.
Next to its neighbours in size
The nearest thing larger than it in this collection is Great Pyramid of Giza at 139 m (454 ft), 1.25× the size. Both figures are the same kind of measurement, so the gap is a fair one.
The nearest thing smaller is Big Ben (Elizabeth Tower) at 96 m (315 ft), so Saturn V is 1.15× as big as it. They come from different groups — buildings & towers against vehicles & ships — which is what makes the pairing interesting.
Against fixed yardsticks
Against three fixed yardsticks — Eiffel Tower (330 m) is 2.98× the size of Saturn V; Saturn V is 3.7× the size of blue whale (29.9 m); Earth (12,742 km) is 115,208× the size of Saturn V.
How this figure was taken
Vehicles are listed by overall length. Rockets are the exception and are given as full stack height standing on the pad. Everything is drawn standing upright so one scale holds.
How the sizes are taken. Each figure says what it measures — height, length, diameter or elevation — and for which individual or convention. Everything is drawn standing upright on one baseline so a single scale holds, including things that are long rather than tall. Values come from the linked Wikipedia article for each item.
Read the rest — common questions
How big is the Saturn V?
111 m (363 ft), measured as height: full stack on the pad (363 ft).
Where does the Saturn V rank among vehicles & ships?
Number 6 of 14 on this site, from Emma Maersk at 397 m down to Tesla Model 3 at 4.69 m.
What is the next size up?
Great Pyramid of Giza, at 139 m, is 1.25× the size.
What is the next size down?
Big Ben (Elizabeth Tower), at 96 m, is 1.15× smaller.
How reliable is the figure?
It is taken from the cited Wikipedia article and states its basis (full stack on the pad (363 ft)). Values are rounded, and where individuals differ the figure is a representative one, so expect small differences from other sources.