iPhone Duo Wallpaper Size Guide: Cover and Inner Dimensions
Exact iPhone Duo wallpaper sizes for both displays: the 1398 × 2034 px cover screen and the 2670 × 1878 px inner display, plus aspect ratios and file formats.
An iPhone Duo wallpaper is not one image — it is one artwork delivered as two files. The cover screen is a tall portrait panel and the inner display is a wide landscape panel, so a single picture cannot fill both without being cropped. This guide lists the exact pixel sizes to use for each screen, explains the aspect ratios behind them, and shows how to pick the right file before you download.
Why one wallpaper ships as two files
The iPhone Duo has two screens with two different shapes. A portrait image that fills the outer cover screen would lose most of its width on the inner display, and a wide landscape image leaves large empty bands on the tall cover screen. Rather than stretch one picture to fit both, every wallpaper here is exported twice at the native resolution of each panel. You download the two files that already match the screens you are setting.
Cover display: 1398 × 2034 pixels (portrait)
The cover display is the outer panel you use when the phone is closed. Its native resolution is 1398 × 2034 pixels, which is clearly taller than it is wide — an aspect ratio of roughly 1 : 1.455. Cover wallpapers are exported in portrait orientation at exactly those dimensions, so nothing important falls outside the frame when you set them.
- Resolution: 1398 × 2034 px
- Orientation: portrait
- Aspect ratio: ≈ 1 : 1.455 (width : height)
- Pixel density: 460 ppi
- Formats in this library: PNG (light), JPG (dark)
Inner display: 2670 × 1878 pixels (landscape)
The inner display is the large folding panel you see when the phone is open. It is wider than it is tall, with a native resolution of 2670 × 1878 pixels in landscape — an aspect ratio of about 1.422 : 1. Inner wallpapers are exported landscape at those dimensions. If you prefer a squarer crop for the open display, the same file also works as a 2670 × 2670 center crop.
- Resolution: 2670 × 1878 px (landscape)
- Orientation: landscape (a 2670 × 2670 square crop also works)
- Aspect ratio: ≈ 1.422 : 1 (landscape)
- Pixel density: 430 ppi
- Formats in this library: PNG (light), JPG (dark)
The two aspect ratios do not match — and that is expected
The cover ratio (≈ 1 : 1.455) and the inner ratio (≈ 1.422 : 1) are close to inverses of each other, but they are not identical. Rotating the cover file does not produce the inner file. That small mismatch is exactly why each wallpaper is exported twice instead of reused. When you download a pair, the cover and inner files are already composed for their own screen, so the main subject stays where the designer intended on both.
Quick reference
| Display | Native resolution | Orientation | Aspect ratio | Pixel density |
|---|---|---|---|---|
| Cover (outer) | 1398 × 2034 px | Portrait | ≈ 1 : 1.455 | 460 ppi |
| Inner (folded open) | 2670 × 1878 px | Landscape | ≈ 1.422 : 1 | 430 ppi |
Are these 4K wallpapers?
No — and that is deliberate. "4K" usually means 3840 × 2160 pixels. Neither iPhone Duo panel reaches that, so a genuine 4K wallpaper would either be upscaled (soft, with invented detail) or letterboxed with black bars. Every file here keeps the panel's native pixel count with no artificial upscaling, which is what makes it look sharp on the actual screen. The cover panel carries 1398 × 2034 pixels and the inner panel 2670 × 1878 pixels, both at a pixel density where the eye cannot resolve individual pixels at normal viewing distance.
Why the preview looks smaller than the download
Grid previews and detail-page images are WebP files capped at 1600 pixels on the long edge so pages load quickly. The download always keeps the full-resolution original — a multi-megabyte PNG or JPG. That is why you should always download before setting a wallpaper: a cropped preview will look soft compared with the file the screen was designed for.
Matching the cover and inner displays
Each wallpaper ships as a matched pair, so both screens share one look. The light wallpaper is a misty mountain scene supplied as PNG; the dark wallpaper is a mountain landscape supplied as JPG. You can set them individually, or browse the full iPhone Duo wallpaper catalog to find a pair you like. For the tap-by-tap steps, follow the how to set a wallpaper guide.
Common size questions
What size should an iPhone Duo wallpaper be?
Use 1398 × 2034 pixels for the cover screen and 2670 × 1878 pixels for the inner display. Those are the native resolutions of the two panels.
Can I use one image for both screens?
You can, but it will be cropped on at least one display. A portrait image suits the cover screen and a landscape image suits the inner display. That is why the matching pair format exists.
Will a 4K or high-resolution photo work?
A larger image will still display, but the phone scales and crops it, and any detail beyond the panel's native resolution is discarded. Starting from the exact size avoids surprise crops.
Do I need an app to set these?
No. Every file is a standard PNG or JPG image that you set through the normal iPhone wallpaper picker — no app, account, or sign-up required.
Get the right files
Download the whole set in one click from the wallpaper catalog, grab individual Cover and Inner files from a wallpaper's page, or try an animated live wallpaper loop for the inner display. Each download keeps the original resolution, so you can re-crop any time without losing quality.