3D print the Willis Tower
A free, printable model of the Willis Tower and the downtown Chicago blocks around it, generated from real map data in your browser.
Free, in your browser. Exports a slicer-ready 3MF.
About the Willis Tower
The Willis Tower, still widely called by its former name, the Sears Tower, is a skyscraper in Chicago, Illinois, in the area known as the Loop. It rises 442.3 m (1,451 ft) on a site bounded by Wacker Drive, Adams Street, Franklin Street and Jackson Boulevard. It was designed by Bruce Graham (architect) and Fazlur Rahman Khan (engineer), both partners at Skidmore, Owings & Merrill (SOM). When it opened in 1973, it was the tallest building in the world, and it kept that title for nearly 25 years.
The structure is a bundle of nine square tubes arranged three by three, and seven of those tubes step back toward the top. By standard counting the tower has 108 stories, although its owners count the main roof as the 109th and the mechanical penthouse roof as the 110th. The facade combines anodized aluminum with black glass. According to one report, one of the architects staggered nine cigarettes vertically until the pair agreed on the arrangement.
The retailer Sears originally filled the lower half and was headquartered in the building until 1994, while other tenants rented the upper stories. The name Willis Tower dates to 2009, when naming rights became part of a lease with the Willis Group, though local residents still use the old name. The Skydeck observation deck, the highest in the United States, ranks among Chicago's most popular tourist destinations.
How it prints
Make this print opens the generator on a 600 m square around the landmark. Buildings print at close to true scale, so the landmark grows with the print size.
| Print size | Landmark height | Scale |
|---|---|---|
| 160 mm default | 141 mm | 1:3,750 |
| 200 mm | 177 mm | 1:3,000 |
| 256 mm | 226 mm | 1:2,344 |
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North
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East
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South
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West
- Twin antennas on top
- Two slim antennas rise from the roof. Layers of 0.12 to 0.16 mm keep them crisp, and Print friendly adapts such thin parts to your print scale.
- A tall, stepped shaft
- The tubes step back as the tower climbs, leaving narrow upper floors. A larger print and slower printing help the slender upper section hold its shape.
- One piece with the ground
- The Willis Tower is joined to the ground in the exported file, and the four-side check found no floating parts, so nothing needs gluing.
- Pick the detail for your nozzle
- In the Buildings settings, set Landmark detail to Print friendly to adapt thin parts and small details to the print scale. Full detail keeps every modeled feature, for larger prints or a finer nozzle.
- Colors
- Buildings, roads, water and ground arrive as separate filament slots in the 3MF. The Willis Tower takes the building color.
- File format
- You get a 3MF for Bambu Studio, OrcaSlicer or PrusaSlicer. Any of them can save it as STL if you need one.
About this model
The Willis Tower is one of more than 2,300 landmark models in Mini Skyline. They are made with AI, and each one is checked from four sides in its real surroundings before release. Everything around it is built from OpenStreetMap and Overture map data. If you would rather print the shape from map data, turn off Landmark models in the Buildings settings.
Common questions
Is there a Willis Tower STL I can download?
Mini Skyline builds the file for you in your browser and exports 3MF, which every major slicer opens. If you need an STL, open the 3MF in your slicer and export it from there.
How big can I print it?
Any print size from 40 mm across. The Willis Tower grows with the print: about 141 mm tall on the default 160 mm print. For a model larger than your printer bed, Project Mode splits the area into tiles.
Is it free?
Yes. Generation runs in your browser, with no account and nothing behind a paywall.
