There should be a tyre sticker on either the 'B' pillar near the door lock hook for one of the front doors, or on the inside of one of the front doors near the door lock mechanism.
Failing that, there's a tyre size table on the very back of the owner's manual.
You can check the difference in rolling diameters using this online tool -
https://www.willtheyfit.com/
(unfortunately, the excellent tool at https://www.rimsntires.com/specspro.jsp isn't available any more)