To make sure images are shown in the best quality on both the mobile and desktop site you need to upload images in a ratio of 3:2 so that they fill the space given to them.
The summary results pages show images at 224x149px and the property details page displays images in the main gallery at 656x437px.
We can accept images up to 1024px in width or height, meaning that landscape images for example will be shown at a maximum 1024x683px.
If you provide larger images it will show a link to 'enlarge' photos which shows your images up to a max height or width.
There isn't a limit to the amount of images you can upload to a listing, but if you use a Data Feed/Software they may have restrictions on the amount. For example, the maximum file size when uploading images from many feeds is 20MB per image.
If you encounter an error with your images, for example you've rotated them yourself and tried to push through another update but the images are still wrong, email customersupport@rightmove.co.uk or call us on 01908 712 338 so we can help.