Height with antennas527 m
1.17Petronas Tower heights
65,875Ladybugs
Photo from Wikimedia Commons
Willis Tower
Chicago's former tallest building, still called the Sears Tower by locals/Towers & Skyscrapers
Completed in 1973 as the Sears Tower, this bundled-tube skyscraper was the world's tallest building for 25 years. Chicagoans stubbornly refuse to call it by its newer name. Its Skydeck Ledge lets visitors step out onto glass boxes 412 meters above the street, which is one way to ruin your afternoon.
Measurements
Height to roof442 m
260 quadrillionProton diameters
2,009Discus diameters
3.2 millionthsJupiter diameters
Total floor area416,000 m²
4.6 tenthsAirport runways
6.9 millionSheets of paper
Total structural steel mass76 million kg
2.8 millionDalmatian dogs
83.5 billionM&Ms
76,000 tonnes of steel
Skydeck Ledge height412 m
51,500Lego studs
172Forklift lengths
7.8 trillionBohr radii
103rd floor glass observation boxes
Base footprint side69 m
7.5 tenthsFootball field lengths
9.06Tape measure lengths
2.1 thousandthsEnglish Channel widths
Each of the nine bundled tubes is 22.9m square
Elevator speed8 m/s
16Escalators
133Sloths