MonitorsmacOS · monitor · 2026

Studio Display 27″ (5K) viewport size

2560 × 1440CSS px · 2× DPR · 5120×2880 physical

By default the Studio Display 27″ (5K) gives a full-screen web page a 2560 × 1440 CSS pixel viewport, drawn on a 5120 × 2880 pixel panel (device pixel ratio 2). That’s the size your media queries see, and it changes if the owner picks a different scaling option (listed below).

CSS viewport (portrait)2560 × 1440what web pages get

Aspect ratio16:9width : height

Device pixel ratio2×1 CSS px = 2 × 2 screen pixels

Physical resolution5120 × 288027″ screen

Visible in the browser2560 × 1329Chrome (macOS), first load

Released2026macOS monitor

See your site on a Studio Display 27″ (5K)

Paste your address (or localhost:3000). doesitfit shows it at exactly 2560 × 1440, with Chrome (macOS)’s bars if you want them, and tells you if anything spills.

Free, no sign-up. Or ask Claude, ChatGPT or Codex to check it.

What a web page actually sees

The full viewport is 2560 × 1440, but the browser’s own bars take some of it. In Chrome (macOS) a page gets about 2560 × 1329 on first load (24px menu bar and Chrome’s 87px tab strip + toolbar, maximized window, Dock hidden). That’s your real “above the fold”.

Setting	Width	Height
Full viewport	2560px	1440px
Visible on first load (Chrome (macOS))	2560px	1329px

What it means for your CSS

Breakpoints

At 2560px: Tailwind uses 2xl (sm: md: lg: xl: 2xl: styles apply); Bootstrap uses xxl.

Tailwind breakpoints on real devices

Content width

With 16px of padding on each side your text column is 2528px; with 24px it’s 2512px. Text closer than 8px to the edge looks cramped (more).

Sharp images

A full-width image needs about 5120px of real pixels (2560 × 2).

<img src="hero-5120.jpg"
  srcset="hero-800.jpg 800w, hero-5120.jpg 5120w"
  sizes="100vw" alt="…">

Styles for this width

Content-first breakpoints beat device lists, but if something breaks at this width:

@media (max-width: 2560px) {
  /* screens 2560px wide and narrower */
}

Other display size settings

The scaling the owner picks changes the viewport your site gets:

Setting	CSS viewport
Default (default)	2560 × 1440
Larger text	1920 × 1080
More space	3200 × 1800

How common is 2560 × 1440?

2560 × 1440 is the #5 most common desktop screen size worldwide, with 2.48% of desktop traffic (Aug 2026, StatCounter).

Same viewport:

Everything about the 2560 × 1440 viewport · All devices 2560px wide · All Monitors sizes

Questions people ask

What is the viewport size of the Studio Display 27″ (5K)?

2560 × 1440 CSS pixels, with a device pixel ratio of 2. The screen itself is 5120 × 2880 physical pixels.

How much of the Studio Display 27″ (5K) screen does a web page get in Chrome?

About 2560 × 1329 on first load: the 24px menu bar and Chrome’s 87px tab strip + toolbar, maximized window, Dock hidden. Design your first screen for that height, not the full 1440px.

Which CSS breakpoint does the Studio Display 27″ (5K) fall into?

At 2560px wide, Tailwind CSS uses 2xl (sm: md: lg: xl: 2xl: styles apply) and Bootstrap uses its xxl tier.

How wide should images be for the Studio Display 27″ (5K)?

A full-width image needs about 5120px of real pixels (2560 CSS px × DPR 2) to look sharp. Use srcset so smaller screens don’t download it.

How can I test my website on a Studio Display 27″ (5K) without one?

Open doesitfit.lol, paste your address (localhost works too) and pick the Studio Display 27″ (5K). It shows your site at exactly 2560 × 1440 CSS pixels and flags anything that spills past the edge.

Guides that help

About these numbers

Confidence: High: confirmed by more than one independent source.

Sources include DeviceAtlas, Chrome DevTools device list (EmulatedDevices.ts), iosref.com, ios-resolution.com. Researched September 2026.