How big is Empire State Building?
Empire State Building: 443 m (1,454 ft). Measured as height — to the tip of the antenna (381 m to the roof).
Source: Wikipedia — Empire State Building
Where it sits
Among the 23 buildings & towers on this page Empire State Building ranks 11th from the top by size. The largest in the group is Burj Khalifa at 828 m, which is 1.87× the size of Empire State Building, while the smallest, Christ the Redeemer, is 30 m.
Stand an adult of 1.7 m beside it and the ratio is 261×: you would need 260 people stacked head to foot to match its size.
In everyday distances
A football pitch is about 105 m long. Empire State Building is 4.22× that, which puts it at 4.2 pitch lengths from end to end.
Walking at an easy 1.4 m/s you cover 443 m in 5.3 minutes. A jet at 900 km/h covers it in 1.8 seconds.
Next to its neighbours in size
The nearest thing larger than it in this collection is Petronas Towers at 452 m (1,483 ft), 1.02× the size. Both figures are the same kind of measurement, so the gap is a fair one.
The nearest thing smaller is Willis Tower at 442 m (1,450 ft), so Empire State Building is 1× as big as it. They sit in the same group.
Against fixed yardsticks
Against three fixed yardsticks — Empire State Building is 1.34× the size of Eiffel Tower (330 m); Empire State Building is 14.8× the size of blue whale (29.9 m); Earth (12,742 km) is 28,750× the size of Empire State Building.
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 Empire State Building?
443 m (1,454 ft), measured as height: to the tip of the antenna (381 m to the roof).
Where does the Empire State Building rank among buildings & towers?
Number 11 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?
Petronas Towers, at 452 m, is 1.02× the size.
What is the next size down?
Willis Tower, at 442 m, is 1× smaller.
How reliable is the figure?
It is taken from the cited Wikipedia article and states its basis (to the tip of the antenna (381 m to the roof)). Values are rounded, and where individuals differ the figure is a representative one, so expect small differences from other sources.