What size to my images need to be to fit in slider?

The theme looks great but I am having trouble getting photos to fit into the slider. I understand I need to change the dimensions of my photos. What is the best size for all my photos so that they will agree with this theme? Here is my site below if you want to take a look at it.


Hi Meggie,

I hope you are well today and thank you for your question.

The images should be at least of the size 1920px X 550px or greater than it.

Best Regards,