What is the same size of the original number in math?

In mathematics, the term "same size" typically refers to the concept of equality. When two numbers are said to be of the same size, it means they have the same value or magnitude. For example, the numbers 5 and 5 are equal, indicating they are the same size. Additionally, concepts like equivalence classes or similar shapes in geometry can also convey a sense of "same size" in different contexts.