Wondering what size is the best iPhone wallpaper resolution? The best resolution to use the same or slightly larger than the native screen resolution, like 1290×2796 or 1320×2868 on newer iPhones. This avoids issues with blurriness, cropping and alignment. Newer iPhones use a 19.5:9 aspect ratio for wallpapers, which eliminates black bars. High-resolution images and slightly larger sizes also ensure better visibility (thanks to the perspective zoom effect), so your home screen and lock screen wallpapers are well-aligned, balanced, and sharp.