Physical diagonal does not predict CSS width
The base and Pro occupy similar hardware footprints but produce different line lengths, card widths and asset-density demands in the browser reference.
Pixel 9 Pro screen size
Pixel 9 Pro: 6.3″, 1280 × 2856, 495 PPI, 427 × 952 CSS viewport at DPR 3. Although physically close to the base model, this Pro uses a wider and denser CSS reference that continues into its successor, so it represents a distinct compact-Pixel rendering environment.
To proportion
6.3″
- Display size
- 6.3″ (16 cm) diagonalofficial
- Resolution
- 1280 × 2856 pxofficial
- Pixel density
- 495 PPIofficial
- Aspect ratio
- 2.23:1calculated
- Physical size (display)
- 2.58″ × 5.75″ (6.6 × 14.6 cm)calculated
- CSS viewport
- 427 × 952 pxreference
- Device pixel ratio
- 3reference
- Release year
- 2024
Model-specific guidance
What this means
The successor preserves this environment
Its panel and layout-facing facts align with the next Pro generation, which makes cross-generation visual comparison more useful than inventing another responsive boundary.
Compare this device
The specifications below come from the device records; the notes explain why each comparison is useful.
| Device configuration | Matched to | Screen | Panel | Viewport / workspace | PPI |
|---|---|---|---|---|---|
| Pixel 9 Pro Current page | Pixel 9 Pro | 6.3″ | 1280 × 2856 | 427 × 952 | 495 |
| Pixel 9 The base model is the essential same-generation comparison because its similar physical size maps to a narrower and less dense CSS canvas. | Pixel 9 Pro | 6.3″ | 1080 × 2424 | 412 × 924 | 422 |
| Pixel 10 Pro The successor retains the tracked Pro display and viewport profile, supporting direct rendering and browser-regression checks. | Pixel 9 Pro | 6.3″ | 1280 × 2856 | 427 × 952 | 495 |
For developers
For developers
/* Pixel 9 Pro — portrait reference, not a breakpoint */
viewport: 427 × 952 CSS px
panel: 1280 × 2856 · DPR 3
/* Test immediately below and above your layout breakpoints. */Tailwind breakpoint
base
0px-639px
Bootstrap breakpoint
xs
0px-575px
Image slot example
1281 × 720
427px wide at DPR 3
Responsive testing plan
Pixel 9 Pro responsive workflow
Use the 427 × 952 CSS px at DPR 3 as a real QA target, then pair it with nearby widths for regression testing.
Model-specific checks
- Audit responsive images and fine iconography here because the density group differs from the base Pixel.
- Use the base model alongside it when evaluating line breaks and constrained action rows.
Phones with a similar screen size
Devices with a similar viewport
Devices with a similar DPR
Sources and review dates
Values marked official come from manufacturer specifications; calculated values are derived from them; reference values are developer layout references and can vary with browser, zoom and operating-system settings.
Sources: Google · github.com · Facts reviewed 2026-09-16
Content reviewed 2026-09-16
Related tools
- Device Screen SizesBrowse sourced screen sizes, resolutions, CSS viewports, DPR and PPI for phones, tablets and laptops, with links to model-level specifications.
- Phone Screen SizesPhone screen size chart with display inches, resolution, PPI and aspect ratio; viewport references where available for tracked iPhone, Galaxy and Pixel phones, including foldables.
- Screen Size ComparisonCompare display dimensions, complete video pictures and A4 page size. View screens side by side or estimate physical size after calibration.
- Viewport Size CheckerSee your browser's CSS viewport size and window size live. Updates as you resize — with current responsive breakpoint for developers.
- Responsive Breakpoint CheckerCheck the current responsive breakpoint live, compare Tailwind and Bootstrap defaults, and copy media queries for common viewport widths.
- Responsive Image CalculatorCalculate responsive image export sizes from CSS pixels and DPR. Generate srcset, sizes and CSS image-set snippets for crisp images.
- PPI CalculatorCalculate PPI from resolution and screen size. Instant results with the formula worked through your numbers, plus physical dimensions and dot pitch.