These are suggested images sizes. When uploading images to the site you will want to make sure all file sizes are small as large files will slow down the site.
Homepage “Our Story” slider: Images should be 400px by 550px
Homepage Masthead Images: 1200px by 480px
Homepage CTA (Call to Action) Section: 500px by 350px
Interior Masthead Images: 1200px by 300px
Blog Post Images: 660px by 325px