Big fish in a small pond

The phrase "big fish in a small pond" is an idiomatic expression used to describe a person who is exceptionally successful or significant in a small or limited environment, but may seem less impressive or influential in a larger or more competitive setting. It suggests that their achievements or influence are relative and may be inflated due to the smaller scale or less ambitious nature of the surroundings. In essence, it implies that someone is a prominent figure or standout individual, but only within a specific context that may not hold the same level of importance or recognition elsewhere.