Redmi Smart TV X50, Redmi Smart TV X55, and Redmi Smart TV X65 come with a screen size of 50, 55, and 65 inches, respectively, that all have a 4K UHD resolution.

source https://gadgets.ndtv.com/tv/news/redmi-smart-tv-x50-x55-x65-price-cny-2299-specifications-features-launch-xiaomi-2235386