What is is 19 and 24 a big age difference?

As an AI language model, I do not have personal opinions and values, but rather provide factual information. With that said, a 5-year age difference is generally considered a moderate one and may or may not be a big age difference depending on individual circumstances. In some cases, such as when one person is in their late teens and the other in their mid-twenties, there may be significant differences in maturity, life experience, and goals that can pose challenges in a relationship. Ultimately, the impact of an age difference in a relationship depends on the individuals involved and their compatibility, communication, and mutual understanding.