iPhone 17 Pro Max screen size

iPhone 17 Pro Max: 6.9″ display, 1320 × 2868 resolution, 460 PPI, 440 × 956 CSS viewport at DPR 3.

To proportion

6.9″

Display size: 6.9″ (17.5 cm) diagonal official
Resolution: 1320 × 2868 px official
Pixel density: 460 PPI official
Aspect ratio: 19.5:9 calculated
Physical size (display): 2.88″ × 6.27″ (7.3 × 15.9 cm) calculated
CSS viewport: 440 × 956 px reference
Device pixel ratio: 3 reference
Release year: 2025

For developers

/* iPhone 17 Pro Max — portrait */
@media (width: 440px) and (min-resolution: 3dppx) { }

/* viewport: 440 × 956 CSS px · DPR 3 · panel: 1320 × 2868 */

Tailwind breakpoint

base

0px-639px

Bootstrap breakpoint

0px-575px

Image slot example

1320 × 744

440px wide at DPR 3

Test this device viewport

iPhone 17 Pro Max responsive workflow

Use the 440 × 956 CSS px at DPR 3 as a real QA target, then pair it with nearby widths for regression testing.

Open checklist Image assets for DPR Compare screen size

Values marked official come from the manufacturer's specifications (source) ; calculated values are derived from them; reference values are standard developer references for this model.