What is the best size safe for a house?

Could you elaborate on the factors one should consider when determining the best size safe for a home? For instance, is it more important to prioritize capacity based on the number of valuables to be stored, or should the focus be on finding a safe that fits discreetly within the living space? Additionally, what about the safe's durability and fire rating? How do these factors influence the decision-making process? Furthermore, are there any specific types of safes that are generally recommended for home use, and if so, why? I'm interested in understanding the nuances behind choosing a safe that not only meets my needs but also fits my home's unique circumstances.