Phone Screen Sizes: Real Width, Height and Pixel Dimensions

Phone screen size chart: width and height for each diagonal

A phone's advertised size is the screen diagonal, measured as if the corners were square. Current phones are close to 19.5:9 (2.17 times as tall as wide), so the diagonal converts to a width and height as follows: width = diagonal × 0.419, height = diagonal × 0.908.

Phones that use a slightly taller 20:9 shape (common on mid-range Android) are about 1 mm narrower and 1 mm taller at the same diagonal: a 6.5-inch 20:9 screen is 68 × 151 mm. Older 16:9 phones are much wider for their diagonal: the 4.7-inch iPhone SE screen is 58 × 104 mm.

6.1 in 65 × 141 mm6.3 in 67 × 145 mm6.9 in 73 × 159 mm4.7 in (16:9) 58 × 104 mm

Real phone dimensions: current models

Screen size sets the minimum body size; the bezel and frame add the rest. These are the manufacturers' published figures.

Apple's 2026 iPhone 18 Pro and 18 Pro Max keep the 6.3- and 6.9-inch screens and the same height and width as the 17 Pro models, so size-based accessories such as sleeves and mounts carry over. Cases do not automatically carry over, because camera layouts and button positions change between generations.

Two patterns stand out. First, phones with the same screen size differ by a few millimeters in length because of bezel and frame design: the 6.3-inch Pixel 9 is 3.2 mm longer than the 6.3-inch iPhone 17. Second, width is what most people feel in the hand, and it only ranges from about 70 to 78 mm across the whole current lineup.

Advertised size vs actual screen size

Phone screens have rounded corners and, on most models, a camera cutout. Manufacturers still quote the diagonal of the full rectangle and round it. Apple's spec pages publish the unrounded figures:

• iPhone 17 ("6.3-inch"): 6.27 in measured as a rectangle.
• iPhone Air ("6.5-inch"): 6.55 in.
• iPhone 16 ("6.1-inch"): 6.12 in, from its 2556 × 1179 panel at 460 ppi.
• Pro Max models ("6.9-inch"): 6.86 in, from 2868 × 1320 at 460 ppi.

The usable area is a little smaller than the rectangle, since the corners are cut away. For screen protectors, this means the size in inches is not enough: buy one made for the exact model, because the corner radius and cutout position differ.

Phone aspect ratios

The taller the ratio, the narrower the screen for its diagonal. A 6.1-inch 16:9 screen would be 76 mm wide; at 19.5:9 it is 65 mm. That is how phones grew from 4.7 to over 6 inches without becoming much harder to hold. For video, a tall phone shows a 16:9 clip with wide black bars on the sides when held sideways: the clip fills the full height but only about 82% of the width. More on ratios in the aspect ratio guide.

Phone screen sizes in pixels and viewport sizes

Designers and developers work in CSS pixels (web) or points (iOS), not physical pixels. iPhones from the 12 on use a 3× scale, so the viewport is the pixel count divided by 3.

For a single mobile design frame, 390-402 points wide covers most iPhones and 360-412 CSS pixels covers most Android phones. Full-screen images for social apps are covered in the social media image size guide.

Phone screens vs tablets and watches

The largest phones are now close to small tablets on the diagonal but not in width. A 6.9-inch phone screen is 73 mm wide; a 7-inch tablet screen is 90 mm wide in portrait and has about 18% more area. At the other end, the screen of a large smartwatch is about 1/10 the area of a phone screen; see smartwatch sizes. Every tablet size is in the tablet sizes chart.

Frequently asked questions