As Kindred uses a fully responsive layout, your images will be cropped and sized to the appropriate dimensions once you upload them to WordPress. As every user’s screen size will be different, the images will adapt to fit their space accordingly. There are no “hard” dimensions for images because of this, but here is an idea of where the different image sizes are used and some recommended maximum sizes:
Home page slider images must be at minimum 2048px width x 900px height
Blog post featured images must be at minimum 767px width and 600px height, when using the equal rows grid layout
If you're still having trouble with your images, we recommend going through our uneven and pixelated images support article.