The iPhone 8 is 5.45 × 2.65 × 0.29 inches, weighs 5.22 ounces, and has a 4.7-inch display.
Pocketability is where the iPhone 8 still feels noticeably compact: the phone is only 5.45 inches tall and 2.65 inches wide. Knowing how big an iPhone 8 is matters most when you are checking one-handed comfort, pocket fit, a car mount, or an accessory that must match the body.
The 4.7-inch figure refers only to the screen measured diagonally, not the height of the phone. The iPhone 8 has substantial space above and below the display for the earpiece, front camera, and Touch ID Home button, so its outside dimensions are larger than the screen number suggests.
iPhone 8 Size And Display: What The Numbers Mean
The iPhone 8 body measures 5.45 inches high, 2.65 inches wide, and 0.29 inch deep. Apple lists the same measurements as 138.4 × 67.3 × 7.3 mm, with a weight of 5.22 ounces or 148 grams.
Those dimensions describe the bare phone. A protective case increases all three outside measurements, and the amount varies by case design, so use the case maker’s finished dimensions when a holder or pocket has a tight size limit.
How Does The iPhone 8 Feel In One Hand?
The iPhone 8’s 2.65-inch width makes it easier to wrap a hand around than the wider iPhone 8 Plus. Its 5.22-ounce weight also keeps the phone relatively light in a pocket or small bag compared with the larger model from the same generation.
- For one-handed use: the 2.65-inch width is the measurement that matters most for grip.
- For pockets: check the 5.45-inch height first, then allow extra room for your case.
- For mounts: compare the mount’s minimum and maximum clamp width with the phone’s cased width.
- For sleeves: compare all three outside dimensions, since thick cases can change the fit.
iPhone 8 Measurements At A Glance
The iPhone 8 combines a small physical body with a 4.7-inch Retina HD LCD. The table separates body measurements from display specifications so the 4.7-inch screen size is not mistaken for the phone’s height.
| Measurement | iPhone 8 Specification | What It Affects |
|---|---|---|
| Height | 5.45 in (138.4 mm) | Pocket and sleeve length |
| Width | 2.65 in (67.3 mm) | Grip and mount fit |
| Depth | 0.29 in (7.3 mm) | Case and holder clearance |
| Weight | 5.22 oz (148 g) | Hand and pocket feel |
| Display Diagonal | 4.7 in | Visible screen size |
| Resolution | 1334 × 750 pixels | Display pixel dimensions |
| Pixel Density | 326 ppi | Pixel concentration |
| Display Type | Retina HD LCD with IPS | Panel technology |
Screen Size Is Not The Same As Phone Size
The iPhone 8’s 4.7-inch measurement runs diagonally across the active display area. The full phone is 5.45 inches tall because the front includes top and bottom bezels outside that display area.
Apple’s iPhone 8 technical specifications list the physical dimensions, weight, 4.7-inch Retina HD display, 1334-by-750 resolution, and 326 ppi density. Those figures are the numbers to use when an accessory listing or repair part asks for the original device size.
Display size also should not be used to judge how much of the phone’s front is screen. The iPhone 8 keeps the physical Touch ID Home button below the display, unlike newer full-screen designs that fit larger diagonal screens into bodies of similar overall height.
iPhone 8 Versus iPhone 8 Plus
The iPhone 8 Plus is plainly larger in every dimension that affects grip: it is 6.24 inches tall, 3.07 inches wide, 0.30 inch deep, and 7.13 ounces. Its display is 5.5 inches diagonally, compared with 4.7 inches on the iPhone 8.
That makes the iPhone 8 Plus 0.79 inch taller and 0.42 inch wider, while adding 1.91 ounces of weight. The depth difference is only 0.01 inch, so width and height are the measurements most likely to decide whether the Plus model fits comfortably in a hand, pocket, or mount.
| Size Detail | iPhone 8 | iPhone 8 Plus |
|---|---|---|
| Height | 5.45 in (138.4 mm) | 6.24 in (158.4 mm) |
| Width | 2.65 in (67.3 mm) | 3.07 in (78.1 mm) |
| Depth | 0.29 in (7.3 mm) | 0.30 in (7.5 mm) |
| Weight | 5.22 oz (148 g) | 7.13 oz (202 g) |
| Display | 4.7 in | 5.5 in |
| Resolution | 1334 × 750 | 1920 × 1080 |
Buying A Case, Mount, Or Screen Protector
The phone’s bare dimensions are enough for comparing device size, but accessory fit needs a more specific check. A case or mount must account for the iPhone 8 body, while a screen protector must match the 4.7-inch front layout rather than the 5.5-inch iPhone 8 Plus.
Use these numbers according to what you are buying:
- Case: start with a 5.45 × 2.65 × 0.29-inch phone, then use the case maker’s stated outside dimensions if the finished size matters.
- Car or desk mount: compare the holder’s clamp range with the phone’s width after the case is installed.
- Screen protector: choose a protector listed for the 4.7-inch iPhone 8 front, not one labeled for iPhone 8 Plus.
- Pouch or sleeve: allow room beyond the phone’s 5.45-inch height and 2.65-inch width so the device can slide in and out without force.
The Four Numbers Worth Checking
The most useful iPhone 8 measurements are 5.45 inches tall, 2.65 inches wide, 0.29 inch deep, and 5.22 ounces in weight. Add the 4.7-inch display size when you are comparing screen protectors or judging viewing area.
For a pocket or mount, outside height and width matter more than the screen diagonal. For a case, use the bare dimensions as the starting point and then check the case’s finished size. For a screen protector, match the 4.7-inch iPhone 8 front instead of relying on the phone’s overall height.
References & Sources
- Apple – iPhone 8 Technical Specifications: Official dimensions, weight, display size, resolution, and pixel density.