What is the perimeter of a square with each side measuring 4?

To find the perimeter of a square, you use the formula:

[

\text{Perimeter} = 4 \times \text{side length}

]

In this case, each side of the square is 4 units in length. Plugging this value into the formula gives:

[

\text{Perimeter} = 4 \times 4 = 16 \text{ units}

]

The perimeter measures the total distance around the square, and since a square has four equal sides, multiplying the length of one side by four provides the total. Thus, a square with each side measuring 4 has a perimeter of 16 units, confirming that the correct answer is indeed the option indicating 16.