Final answer:
The proper sauce border size for a pizza crust is typically about 1 inch, which allows for adequate crust development and helps maintain balance in the pizza's taste and appearance.
Step-by-step explanation:
The proper sauce border size for an original crust pizza generally varies depending on the style of pizza and personal preference, but a common guideline is approximately 1 inch. This ensures that there is enough room for the crust to develop its texture and flavor during baking without the sauce interfering with the rising edge. While there are no strict rules, maintaining a consistent border size can contribute to the aesthetic and taste balance of a pizza.