You have different ways of setting the size of a figure.
You can use \textwidth command within the width parameter, like this:
By using the \textwidth command, you determine that the figure will not have a width that is greater than the width of the text, i.e., the width of the column.
Or you can use the scale parameter:
The scale resizes the figure relative to its original size, so it is not guaranteed that it will not overlap the text. In this case you have to try different scale values and adjust it to the space you have available for the image.