product name too big

I am using a theme child and I would like to show a smaller product name on the product list but also on the product page.
Please see the screenshot.
That product name in the red cyrcle I want to be smaller.
Can you please give the code to add to my css of the child them.
I will grant you support access in case you want to check it.
this is the subsite where I want to change it. as example for all the other subsite.