Image Dimensions
As Monstera 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:
Full width slider: 100% width of screen, 550px tall (recommended min width: 1400px)
Multi-slide slider: 50% width of screen, 400px tall (recommended min width: 700px)
Blog feed image: 500px x 500px
Page/blog post full page featured image: 100% width of screen, 400px height (recommended min width: 1400px)
Sidebar image: 300px x 300px
Blog post images: 900px x any height