The size of the universe in miles is not a well-defined concept due to the vastness and dynamic nature of the universe. The universe is constantly expanding, and its exact size is difficult to measure accurately.
However, I can provide you with an estimate of the observable universe's size in miles. The observable universe is the portion of the universe that we can see from Earth, limited by the distance that light has had the opportunity to reach us since the Big Bang.
The current estimate for the radius of the observable universe is approximately 46.6 billion light-years. To convert this into miles, we need to consider that one light-year is approximately 5.88 trillion miles. Therefore, the rough estimate for the radius of the observable universe in miles is around 274 quintillion miles.
It's important to note that this estimate is based on our current understanding of the universe and is subject to revision as new observations and measurements are made. Additionally, beyond the observable universe, the true size of the entire universe, including its possible infinite or unobservable regions, remains uncertain.