The iPhone 6 has a thickness of 6.9 millimeters (0.27 inches), making it noticeably slimmer than earlier generations of Apple phones. This reduction in thickness builds on the iPhone 5, 5s, and 5c at 7.6 millimeters and contributes to a slimmer profile that affects how the device fits in hand, slips into pockets, and pairs with cases and accessories. Below we clarify exact measurements, explain how those numbers translate to everyday use, and provide context by comparing the iPhone 6 to prior and subsequent models.
Measured Dimensions of the iPhone 6
Height, Width, Depth, and Weight
Beyond thickness, the iPhone 6’s overall dimensions and weight influence how the device feels and functions. Apple pairs the 6.9-millimeter profile with a larger screen and revised internal layout to create a handset that balances display size with one-hand usability.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Thickness | 6.9 mm (0.27 in) | Apple specifications / Independent teardowns |
| Height | 138.1 mm (5.44 in) | Apple specifications |
| Width | 67.0 mm (2.64 in) | Apple specifications |
| Depth (with camera module) | ≈7.9 mm at camera bump | Teardown measurements |
| Weight | 129 g (4.55 oz) | Apple specifications |
Why Thickness Matters
Ergonomics and Comfort
At 6.9 millimeters, the iPhone 6 trades a small amount of one-hand reachability for a sleeker look. The increased chassis width to 67.0 mm partly offsets the slim profile, so while the phone is thinner, it can feel slightly wider in the hand. For many users, this combination yields a more comfortable grip than thicker predecessors once you adapt to the wider body.
Pocket Fit and Portability
A 6.9-mm profile slips more easily into tight jeans pockets and thinner outerwear than thicker models. However, the larger footprint means that without a case, the phone’s exposed edges and corners rest closer to pocket seams, raising the long-term risk of scratches or dents. Thinner glass surfaces also make the device more susceptible to cracking upon impact, which is a durability trade-off that often leads users to choose protective cases.
Thermal and Battery Trade-offs
Reducing thickness limits how much passive cooling space is available, so Apple tuned power efficiency and relied on glass and aluminum to manage heat. The thinner chassis can feel warmer under heavy use compared with bulkier devices, yet typical daily tasks rarely reach problematic temperatures. Battery size remains strong for the era, but slim internal margins leave less room for future battery increases without other compromises.
Design and Build Context
Materials and Structure
The iPhone 6 uses an aluminum unibody chassis with glass panels front and back. The 6.9-millimeter thickness is achieved by tightening component stacking, slimming the battery relative to earlier models, and optimizing internal connectors. These choices enable a more premium, flush design while keeping manufacturing complexity manageable.
The Camera Bump
Although the chassis is 6.9 mm for most of its height, the camera module sits slightly proud, creating a camera bump of roughly 1.0–1.1 millimeters above the back glass. This design ensures the lens is flush with the protective glass when placed on a flat surface, reducing scratches but creating a visible lip that can catch on cases or pockets.
Practical Implications of the Thickness
Case Compatibility and Use
Because the iPhone 6 is thin, many cases add negligible bulk while providing meaningful scratch and drop protection. Case designs vary widely: some add just 1 mm or less, while rugged options can increase total depth by 2 to 3 millimeters or more. A slim profile keeps the device close to the hand, but the larger button spans and glass edges make a case advisable for most users.
Screen Protector Difficulty
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Thinner devices can be slightly more challenging to apply screen protectors to, as precise alignment is critical and the camera bump must be accommodated. Many protectors now include raised edges or bezel designs specifically tailored for the iPhone 6 to account for the camera bump and preserve camera functionality.
Charging and Connectivity Ports
The Lightning port remains at the bottom edge, and the headphone jack is at the top. The slim profile does not obstruct port access, but users with thicker cases may notice port covers or slight misalignment if the case pushes the phone unevenly in the pocket or against surfaces.