Hi Jen, thanks for posting! There isn't currently a way to only alter size, but what you could do is select your org chart, then on the gray toolbar that appears at the top of your canvas you can select "clear overrides" and it will remove all additional formatting (including size) and make every shape the same. Please note if you have added other defaults to these shapes (i.e. color, font, etc), those will be removed as well when you select to clear overrides. Please let me know if you have any additional questions!