To avoid cropping or letterboxing, the lock screen image must have an aspect ratio identical to the display. Modern Windows 11 devices overwhelmingly use 16:9 (widescreen) or 16:10 (less common). For 99% of users, a 16:9 aspect ratio is mandatory.
Using the wrong dimensions can result in awkward cropping, pixelation, or black bars. This guide covers everything you need to know about Windows 11 lock screen image dimensions, aspect ratios, and best practices for a crisp, professional display. windows 11 lock screen image size
Windows places several elements on top of your image: To avoid cropping or letterboxing, the lock screen