Aspect ratio issue on featured images widget

Hi. I have ani issue with the theme, it seems that the central image has the 1:42 aspect ratio and the smaller ones have 1:43 aspect ratio. This makes my header look ugly. Can you help me somehow? The site address is www.bielskosmakuje.pl

Hello,

Well, please try to crop your images accordingly, so they have the same aspect ratio.

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.

What is the suggested aspect ratio / size for the photos used in featured widget area?

Hello,

GreatMag demo site contains 1.41 aspect ratio images (640×425px and 1280×850px) in that widget:
http://demo.athemes.com/greatmag/

Kind Regards, Roman.