Make controls the same size - PowerPoint

Select all the controls you want to be the same size.
Select the dominant control.
From the Format menu, choose Make Same Size.
From the cascading menu, choose one of the following:
- Width - to make all selected controls the same width as the dominant control.
- Height - to make all selected controls the same height as the dominant control.
- Both - to make all selected controls the same height and width as the dominant control.