In Magento 1, To change the image size we have to change in every listing page. So we have to remember all the file list and search on whole site.

In Magento 2, We have good news to resize the image. We do not need to remember all the file. All the size is managing from 1 file view.xml .

View.xml file located in app/design/<vendor>/<theme>/etc

code:

After Adding this in file, Refresh the page.

Now you can see the image size which we have changed will apply.