How big is Eiffel Tower?
Eiffel Tower: 330 m (1,083 ft). Measured as height — including antennas.
Source: Wikipedia — Eiffel Tower
Where it sits
Among the 23 buildings & towers on this page Eiffel Tower ranks 13th from the top by size. The largest in the group is Burj Khalifa at 828 m, which is 2.51× the size of Eiffel Tower, while the smallest, Christ the Redeemer, is 30 m.
Stand an adult of 1.7 m beside it and the ratio is 194×: you would need 194 people stacked head to foot to match its size.
In everyday distances
A football pitch is about 105 m long. Eiffel Tower is 3.14× that, which puts it at 3.1 pitch lengths from end to end.
Walking at an easy 1.4 m/s you cover 330 m in 3.9 minutes. A jet at 900 km/h covers it in 1.3 seconds.
Next to its neighbours in size
The nearest thing larger than it in this collection is USS Nimitz at 333 m (1,092 ft), 1.01× the size. Note the two figures are not the same measurement: for Eiffel Tower it is height, for USS Nimitz it is length.
The nearest thing smaller is Chrysler Building at 319 m (1,047 ft), so Eiffel Tower is 1.03× as big as it. They sit in the same group.
Against fixed yardsticks
Against three fixed yardsticks — Eiffel Tower is 11× the size of blue whale (29.9 m); Earth (12,742 km) is 38,612× the size of Eiffel Tower.
How this figure was taken
Building heights depend on the rule used: architectural height counts spires but not antennas, tip height counts everything. The basis is named with each figure.
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 Eiffel Tower?
330 m (1,083 ft), measured as height: including antennas.
Where does the Eiffel Tower rank among buildings & towers?
Number 13 of 23 on this site, from Burj Khalifa at 828 m down to Christ the Redeemer at 30 m.
What is the next size up?
USS Nimitz, at 333 m, is 1.01× the size.
What is the next size down?
Chrysler Building, at 319 m, is 1.03× smaller.
How reliable is the figure?
It is taken from the cited Wikipedia article and states its basis (including antennas). Values are rounded, and where individuals differ the figure is a representative one, so expect small differences from other sources.