Calculate the perimeter of a square with a side length of 6 cm, given it's drawn on a centimeter grid.

The shape is drawn on a centimetre grid. Count the number of unit lengths along one side of the square.
Counting the grid squares, the square has a side length of 6 units. Since it's a centimetre grid, each unit is $1 \text{ cm}$.
So, the side length $s = 6 \text{ cm}$.

The perimeter $P$ of a square is given by the formula:

The calculated perimeter is $24 \text{ cm}$. The value provided in the image is also $24 \text{ cm}$. Therefore, the provided answer is correct.