What is the diameter of the 16th floor on the gherkin?

The diameter of the 16th floor of the Gherkin (30 St Mary Axe) in London is approximately 20 meters (about 66 feet). This floor features a unique design with a distinctive oval shape that is characteristic of the building's overall architecture. The Gherkin's design includes gradual tapering, which affects the dimensions of each floor as you move upwards.