The Juno observations showed that Jupiter…

The Juno observations showed that Jupiter has an equatorial diameter of 88,841 miles (142,976 km), which is about 5 miles (8 km) smaller than previous measurements had indicated. The observations also showed that Jupiter's diameter from north pole to south pole is 83,067 miles (133,684 km), about 15 miles (24 km) smaller than previously estimated.

The planet, like our own, is not a perfect sphere, but rather a bit flattened - and, based on the new data, slightly more so than previously known. Jupiter is about 7% larger at the equator than at the poles. For comparison, Earth's equator is only 0.33% larger than its diameter at the poles.