This is a puzzle. Stars in the night sky are always pinpoints, so none of them are "enormous," "huge" or "big" in visual size. The brightest bluish stars by "apparent" or "visual" magnitude are Sirius, Vega, Rigel, Alpha Eridani, Beta Centuari. The last two are too far south to be seen from most places in the United States. Then there's Altair and Spica. None of these could be considered "huge" or "big."
The only round object in the night sky visible without a telescope is the Moon, unless you looking with spiritual "eyes." Then, it could be any star in the universe.
If you gave some indication as to direction and time, that would help. For instance, just after sunset, low in the eastern sky during April. Your location would also help (especially latitude). Without these kinds of specifics, then there is little anyone can do to help.