Incorrect spelling, explanation: to big is not grammatically correct and does not convey a meaningful expression in English. This version is a mistake because it does not follow the rules of English grammar. In English, to is used as a preposition or part of an infinitive verb. When used as a preposition, it indicates movement or direction toward a particular point or destination. For example, He went to the store. In the phrase too big, too is an adverb, and big is an adjective.

Correct spelling, explanation: too big is an idiomatic expression used to indicate excess or something being larger than necessary or desired. It is used to express that the size or magnitude of the object or situation is beyond what is appropriate or suitable for a particular purpose. When you say something is too big, it suggests that it might be impractical, uncomfortable, or not suitable for its intended use or function. It could refer to physical objects, such as clothes, furniture, or buildings, as well as abstract concepts like projects, ideas, or problems. You can’t change it to to big.

Definition of too big:
phrase, larger than needed
The company’s expansion plans were considered too big to be executed in the current economic climate.
The workload for this project is too big for one person to handle; we need a team to work on it.

Collocations with too big:
Some most commonly used collocations include:
1. Too big for the room: refers to an object or piece of furniture that is too large to fit comfortably or appropriately in a particular space.
The oversized sofa was too big for the small living room and made the space feel cramped.
2. Too big a deal: used when someone is making something seem more important or significant than it actually is.
It’s just a small mistake; don’t make it too big a deal.
3. Too big for its own good: describes something that has become so large or successful that it is causing problems or negative consequences.
The corporation’s expansion plans were too big for its own good, leading to overextension and financial troubles.
4. Too big to be true: expresses skepticism or doubt about the credibility of an extraordinary claim or story.
The incredible offer seemed too big to be true, so I decided to investigate further.