How big is Washington Monument?
Washington Monument: 169 m (554 ft). Measured as height — overall height.
Source: Wikipedia — Washington Monument
Where it sits
Among the 23 buildings & towers on this page Washington Monument ranks 18th from the top by size. The largest in the group is Burj Khalifa at 828 m, which is 4.9× the size of Washington Monument, while the smallest, Christ the Redeemer, is 30 m.
Stand an adult of 1.7 m beside it and the ratio is 99.4×: you would need 99 people stacked head to foot to match its size.
In everyday distances
A football pitch is about 105 m long. Washington Monument is 1.61× that, which puts it at 1.6 pitch lengths from end to end.
Walking at an easy 1.4 m/s you cover 169 m in 2 minutes. A jet at 900 km/h covers it in 676 milliseconds.
Next to its neighbours in size
The nearest thing larger than it in this collection is Statue of Unity at 182 m (597 ft), 1.08× the size. Both figures are the same kind of measurement, so the gap is a fair one.
The nearest thing smaller is Great Pyramid of Giza at 139 m (454 ft), so Washington Monument is 1.22× as big as it. They sit in the same group.
Against fixed yardsticks
Against three fixed yardsticks — Eiffel Tower (330 m) is 1.95× the size of Washington Monument; Washington Monument is 5.65× the size of blue whale (29.9 m); Earth (12,742 km) is 75,396× the size of Washington Monument.
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 Washington Monument?
169 m (554 ft), measured as height: overall height.
Where does the Washington Monument rank among buildings & towers?
Number 18 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?
Statue of Unity, at 182 m, is 1.08× the size.
What is the next size down?
Great Pyramid of Giza, at 139 m, is 1.22× smaller.
How reliable is the figure?
It is taken from the cited Wikipedia article and states its basis (overall height). Values are rounded, and where individuals differ the figure is a representative one, so expect small differences from other sources.