How many inches are there in a foot?

In the Imperial system, which is commonly used in the United States and other countries for measuring length, one foot is defined as being equal to 12 inches. This conversion is a standard measurement and provides the basis for various applications in construction, aviation, and everyday usage. Thus, when addressing how many inches make up a foot, the correct answer is the measurement that aligns with this established definition. Other options like 10, 14, and 16 inches do not correspond to the correct length comparison, as they deviate from the standard conversion of feet to inches.