Hi Katie,
Thanks for reaching out and thanks for using Crio Pro WordPress theme!
Working with images can always be a bit tricky with WordPress, WordPress’s cropping and aspect ratio tools have been notoriously ineffective and it’s always recommended to resize and crop your images in a 3rd party tool before uploading to WordPress. I always use Pixlr, a free online image editing software, to adjust my images before uploading to you WordPress. It may be beneficial to you as well.
I hope this helps. Please let us know if there’s anything else that we can answer for you.