Post Image on Front Page

Hello everyone!
I have read some posts to this problem, but it seems it does not work with my site.

So: Images on the Front-Page are cropped. Why?

What should I do to make them have 100% width.

Thanks a lot

Oh an here ist my site:


You can try this Custom CSS to make it 100% wide:

.entry-thumbnail img {
    width: 100% !important;

If you have a Child Theme Setup already, then add the above CSS to the Child Theme’s style.css or in case you haven’t setup a Child Theme already, then you can also use this plugin to add the Custom CSS to it:

Please let me know how the CSS works.

Best Regards,