Apple lists these outside dimensions for the two models:
| Model | Height | Width | Depth | Weight | Display diagonal |
|---|---|---|---|---|---|
| iPhone 17 Pro Max | 6.43 in (163.4 mm) | 3.07 in (78.0 mm) | 0.34 in (8.75 mm) | 8.22 oz (233 g) | 6.9 in class |
| iPhone X | 5.65 in (143.6 mm) | 2.79 in (70.9 mm) | 0.30 in (7.7 mm) | 6.14 oz (174 g) | 5.8 in class |
The measurements describe the phone body. A case adds to its outside dimensions. Apple's iPhone X specification notes that its screen measures 5.85 inches diagonally when treated as a full rectangle, while the viewable area is smaller.