Oh I see, it was custom css code for Home page – http://prntscr.com/hge66h I’ve deleted this part of custom code, please check.
Please note that mages size for the blog posts you can adjust in Theme Options > Blog & Portfolio > Blog > Images sizes for blog. If you are using Blog elements don’t forget to set image size in element settings http://prntscr.com/gjp6lx in another case, it will use medium size.
