The ideal iPhone wallpaper dimension depend on your device model, as screen sizes and resolutions vary. For example, newer iPhones like the iPhone 14 and 15 series typically use wallpapers around 1179 × 2556 pixels, while older models like the iPhone 11 use 828 × 1792 pixels. To get the best results, always match your wallpaper resolution to your screen size or use a slightly larger image to avoid stretching. This ensures your wallpaper looks sharp, properly centered, and free from pixelation or cropping issues.