How big is Leaning Tower of Pisa?
Leaning Tower of Pisa: 56 m (184 ft). Measured as height — average height of the tower.
Source: Wikipedia — Leaning Tower of Pisa
Where it sits
Among the 23 buildings & towers on this page Leaning Tower of Pisa ranks 22nd from the top by size. The largest in the group is Burj Khalifa at 828 m, which is 14.8× the size of Leaning Tower of Pisa, while the smallest, Christ the Redeemer, is 30 m.
Stand an adult of 1.7 m beside it and the ratio is 32.9×: you would need 32 people stacked head to foot to match its size.
In everyday distances
It fits inside a football pitch 1.9 times over — a pitch is about 105 m and Leaning Tower of Pisa is only 56 m.
Walking at an easy 1.4 m/s you cover 56 m in 40 seconds. A jet at 900 km/h covers it in 224 milliseconds.
Next to its neighbours in size
The nearest thing larger than it in this collection is Concorde at 61.7 m (202 ft), 1.1× the size. Note the two figures are not the same measurement: for Leaning Tower of Pisa it is height, for Concorde it is length.
The nearest thing smaller is Boeing 737-800 at 39.5 m (130 ft), so Leaning Tower of Pisa is 1.42× as big as it. They come from different groups — vehicles & ships against buildings & towers — which is what makes the pairing interesting.
Against fixed yardsticks
Against three fixed yardsticks — Eiffel Tower (330 m) is 5.89× the size of Leaning Tower of Pisa; Leaning Tower of Pisa is 1.87× the size of blue whale (29.9 m); Earth (12,742 km) is 227,536× the size of Leaning Tower of Pisa.
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 Leaning Tower of Pisa?
56 m (184 ft), measured as height: average height of the tower.
Where does the Leaning Tower of Pisa rank among buildings & towers?
Number 22 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?
Concorde, at 61.7 m, is 1.1× the size.
What is the next size down?
Boeing 737-800, at 39.5 m, is 1.42× smaller.
How reliable is the figure?
It is taken from the cited Wikipedia article and states its basis (average height of the tower). Values are rounded, and where individuals differ the figure is a representative one, so expect small differences from other sources.