How to Split Pictures on Instagram And Make a Giant Square 1 You can select up to 5 types of grid, 3×1, 3×2, 3×3, 3×4, 3×5. 3×3 works best for giant square images. 2 Select the grid type. Drag the image to fit your grid (You can also rotate, zoom or drag your image if you want to). 3 After selecting, click the next button on the top right.