With a height-to-width ratio of 24:1, Steinway Tower has been described by its developers as “the most slender skyscraper in the world.” The tower's facade includes blocks of terracotta, a material that appears to change color and texture when seen in different lights and from different angles.

The Steinway Tower, located at 111 West 57th Street in New York City, is unique primarily for being the thinnest skyscraper in the world. It has a staggering height-to-width ratio of approximately 24:1, standing 1,428 feet tall while being only about 60 feet wide at its base. Architecturally, it is a "pencil tower" that integrates a historic 1925 landmark, Steinway Hall, at its base, blending neo-Renaissance heritage with modern glass-and-terracotta engineering. The facade is made of thousands of terracotta panels and bronze filigree that create a shimmering, textured effect that changes with the light. Another unique engineering feature is its "feathered" profile; as the tower rises, it tapers off in a series of setbacks, making it look like it disappears into the clouds. Because of its extreme slenderness, the building uses a massive 800-ton tuned mass damper at the top to counteract the sway caused by high winds. Inside, the tower is so narrow that most of its 60 luxury residences occupy an entire floor, offering 360-degree views of Central Park and the Manhattan skyline with a level of privacy that is rare in a high-rise.