iPhone 8 Plus Size at a Glance
The iPhone 8 Plus measures 158.4 mm (6.23 in) in height, 78.1 mm (3.07 in) in width, and 7.5 mm (0.30 in) in thickness, with a weight of 202 g (7.1 oz). It features a 5.5-inch Retina HD display and an aluminum unibody design. These dimensions define its one-handed reach, pocket fit, and compatibility with cases and accessories.
Physical Dimensions and Design
Height, Width, and Thickness
The iPhone 8 Plus follows the enclosure approach of the iPhone 8, using an aluminum frame and glass back. The added height relative to narrower phones supports the 5.5-inch display while keeping the top edge within thumb reach for many users.
Weight and Balance
At 202 g (7.1 oz), the iPhone 8 Plus is noticeably heavier than smaller iPhones. The weight is distributed along the aluminum frame, which affects handling and pocket comfort. Paired with the glass back, it increases the importance of using a case for protection.
Display and Screen Measurements
Diagonal and Viewable Area
The 5.5-inch display refers to the diagonal visible when rounded corners and camera cutout are excluded. Apple specifies this as a Retina HD display with IPS technology, offering 1920 x 1080 resolution at 401 ppi for sharp text and images.
Aspect Ratio and Usable Space
By adopting a 16:9 aspect ratio, the iPhone 8 Plus aligns closely with HD content and video playback. The screen-to-body ratio is high for its generation, though not as extreme as later edge-to-edge designs.
Portability and Fit
One-Handed Use
With a width of 78.1 mm, the iPhone 8 Plus sits at the upper edge of one-handed usability. Users with smaller hands may reach the top corners using their other hand or gestures. Height does not prevent access, but width is the primary constraint.
Pocket and Bag Compatibility
The slim 7.5 mm thickness helps the device fit into most pockets and small bags. Combined with the glass back, careful placement reduces the risk of pressure damage when carried alongside keys or coins.
Cases, Accessories, and Compatibility
Standard Case Sizes
Because dimensions are fixed and well-documented, cases and screen protectors for the iPhone 8, 8 Plus, and 7/7 Plus are often compatible. Verify cutouts for camera, buttons, and ports when comparing models from different years.
Screen Protectors and Mounts
Tempered glass screen protectors are widely available labeled specifically for the 5.5-inch iPhone 8 Plus. Car mounts and wireless chargers designed for this model account for the size and placement of the charging coil near the top edge.
Key Specs at a Glance
Below is a concise overview of the most relevant dimensional and display metrics for quick reference.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Height | 158.4 mm (6.23 in) | Apple Spec Sheet |
| Width | 78.1 mm (3.07 in) | Apple Spec Sheet |
| Thickness | 7.5 mm (0.30 in) | Apple Spec Sheet |
| Weight | 202 g (7.1 oz) | Apple Spec Sheet |
| Display Size | 5.5-inch Retina HD (diagonal) | Apple Product Page |
| Resolution | 1920 x 1080 pixels | Apple Product Page |
| Aspect Ratio | 16:9 | Display Certification |
| Pixel Density | 401 ppi | Apple Product Specifications |
Practical Context and Use Cases
Handheld Use and Ergonomics
The combination of height and weight makes the iPhone 8 Plus suitable for users who prefer larger screens for media and reading. However, prolonged one-handed use may cause fatigue. Switching to a two-handed grip or enabling accessibility gestures can reduce strain.
Media and Gaming
The 5.5-inch display offers a balanced size for watching video and gaming, often without excessive border distortion seen on smaller panels. Landscape gaming benefits from the 16:9 ratio, though some titles are optimized for the 4.7-inch iPhone models.
Summary
The iPhone 8 Plus measures 158.4 mm in height, 78.1 mm in width, and 7.5 mm in thickness, weighing 202 g. Its 5.5-inch Retina HD display with 1920 x 1080 resolution and 401 ppi suits users who want a larger screen without dramatically increasing one-handed reach difficulty. These dimensions support a range of cases and accessories while fitting most pockets, making it a durable reference point for size comparisons in the iPhone lineup.