Size at a Glance: Nearly Identical, But Not Quite
The iPhone 7 and iPhone 8 look almost the same on paper because Apple carried over the same basic frame. That means cases designed for one generally fit the other, and the visual footprint in your hand changes only slightly. If you are choosing between the two based on size alone, the decision hinges on a handful of details most people overlook, not on a dramatic redesign.
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Both phones use a 4.7-inch display measured corner to corner. The chassis, bezel spacing, and overall proportions stay the same generation to generation. The real differences appear in thickness, weight, and the subtle feel of the materials, which can tip the balance for anyone who cares about how a phone sits in a pocket or a bag.
Dimensions and Build: Millimeter Differences That Add Up
Apple has not published a side-by-side dimensions table in recent years, but the two models share the same height and width within fractions of a millimeter. The iPhone 8 is fractionally thicker and slightly heavier because of the glass back required for wireless charging, a design shift Apple introduced alongside the larger iPhone X.
Below is a compact comparison of the key size and build attributes.
| Attribute | iPhone 7 | iPhone 8 |
|---|---|---|
| Display size | 4.7 inches | 4.7 inches |
| Height | 138.3 mm | 138.4 mm |
| Width | 67.1 mm | 67.1 mm |
| Depth | 7.1 mm | 7.3 mm |
| Weight | 138 g | 148 g |
| Back material | Aluminum | Glass |
| Wireless charging | No | Yes |
The extra 10 grams of the iPhone 8 and 0.2 millimeter of added thickness are small on paper but perceptible when you swap the two back-to-back. The aluminum back of the iPhone 7 feels colder and grippier, while the glass back of the iPhone 8 feels warmer and slightly slicker, even before you add a case.
What the Same Size Means for Cases and Accessories
Because the height and width are functionally identical, a case made for the iPhone 7 will line up correctly with the iPhone 8. Camera cutouts, volume buttons, and mute switches all sit in the same positions. This overlap makes it easy to move a case between the two devices or to pick up a replacement shell without worrying about fit.
The one exception is wireless charging. If you use a wireless charging pad or stand, the iPhone 8 works out of the box and the iPhone 7 does not. That is not a size issue, but it affects how you set the phone down on a desk or nightstand, which can change how bulky your setup feels.
Handling and Pocketability
In daily use, the iPhone 7 and iPhone 8 feel almost the same size in the hand. The 10-gram difference tends to matter more during long reading or browsing sessions, when your hand registers the heft even if your pocket does not. The extra thickness on the iPhone 8 is only noticeable when you press the phone flat against a surface or compare it directly with the slimmer iPhone 7.
If you are choosing based on how the phone fits in a tight pocket or a small pouch, the iPhone 7 has a marginal edge simply because it is thinner and lighter. If you prefer a phone that feels solid and less prone to sliding on a table, the slightly heavier iPhone 8 can feel more planted.
Why You Might Still Prefer One Size Perception Over the Other
Size perception does not stop at dimensions. The glass back of the iPhone 8 makes the phone look sleeker and more modern, even though the footprint is the same. That visual impression can matter if you are deciding which phone to carry in a meeting or on a date, or if you want a device that does not look visibly dated next to newer models.
The aluminum back of the iPhone 7, on the other hand, hides fingerprints better and feels more durable to users who worry about glass scratches. Neither phone is waterproof to the same official standard as current iPhones, but both carry an IP67 rating for splash and brief submersion, so the material choice does not change the water resistance story.
Which Size Is Right for You
If you want the smallest possible iPhone that still fits a standard case, accessories, and most hands, both models serve you equally. The iPhone 7 wins on raw thinness and lightness. The iPhone 8 wins on the feel of wireless charging and the perception of a more refined build. When the size is virtually identical, the choice comes down to whether you value the glass back and Qi charging enough to accept a fraction of extra weight and thickness.