iPhone Duo Dimensions and Screen Size
Updated · Source: Apple technical specifications
The iPhone Duo measures 84.1 × 117.8 × 11.3 mm folded and 164.6 × 117.8 × 5.2 mm unfolded, and weighs 254 g. It has a 5.4″ outer screen and a 7.6″ inner folding screen.
iPhone Duo dimensions
| Folded | Unfolded | |
|---|---|---|
| Height | 117.8 mm (4.64 in) | 117.8 mm (4.64 in) |
| Width | 84.1 mm (3.31 in) | 164.6 mm (6.48 in) |
| Thickness | 11.3 mm (0.44 in) | 5.2 mm (0.21 in) |
| Weight | 254 g (8.96 oz) | |
Folded, the Duo is short and wide rather than tall and narrow like a Galaxy Z Fold. Open, it is wider than it is tall, so the inner screen is used in landscape by default. It is Apple's heaviest iPhone, and reviewers measured it at about 2 mm thicker and 53 g heavier than the Galaxy Z Fold 8 when folded.
iPhone Duo screen size and resolution
| Outer screen | Inner screen | |
|---|---|---|
| Diagonal | 5.4″ (5.36″ as a rectangle) | 7.6″ (7.58″ as a rectangle) |
| Resolution | 1398 × 2034 px | 2670 × 1878 px |
| Pixel density | 460 ppi | 430 ppi |
| Refresh rate | ProMotion, up to 120Hz on both | |
| Brightness | 3000 nits peak on both | |
Both are Super Retina XDR OLED panels, and Apple keeps the aspect ratio close between them so apps don't jump around when you open the phone. The inner screen uses an under-display front camera, so there's no cutout; the outer screen has a 12MP camera in the top right.
Other key specs
- Chip: A20 Pro
- Storage: 256GB, 512GB, 1TB, 2TB
- Unlock: Touch ID in the side button (no Face ID)
- Price: from $1,999 in the US
- Release date: October 23, 2026
What the screen size means for your website
Physical size doesn't tell you how wide a web page is. Folded, Safari gives pages 382 CSS px, narrower than an iPhone 18 Pro, because a 84pt Safari column takes the right edge. Unfolded, pages get 951 CSS px with the crease down the middle.
FAQ
How big is the iPhone Duo?
Folded, the iPhone Duo is 117.8 mm (4.64 in) tall, 84.1 mm (3.31 in) wide and 11.3 mm (0.44 in) thick. Unfolded it is 164.6 mm (6.48 in) wide and only 5.2 mm (0.21 in) thick. It weighs 254 g (8.96 oz).
What is the iPhone Duo screen size?
The outer screen is 5.4″ and the inner folding screen is 7.6″. Measured as standard rectangles, they are 5.36″ and 7.58″ diagonally; the actual viewable area is slightly smaller because of the rounded corners.
Is the iPhone Duo wider than it is tall?
Yes, when it's open. The unfolded iPhone Duo is 164.6 mm wide but 117.8 mm tall, a passport-style shape. Folded it is a short, wide phone at 84.1 × 117.8 mm.
What is the iPhone Duo screen resolution?
The outer display is 1398 × 2034 pixels at 460 ppi. The inner display is 2670 × 1878 pixels at 430 ppi. For web pages, Safari works in CSS pixels instead; see the iPhone Duo viewport guide for those numbers.