Galaxy A55 screen size & viewport

The Galaxy A55 renders web pages at a CSS viewport of 384 × 832 in portrait (832 × 384 in landscape).

What these numbers mean

384 × 832 is the CSS viewport size — the coordinate space your layout, media queries and vw/vh units work in. It is not the hardware pixel count: the Galaxy A55 packs more physical pixels behind each CSS pixel (its device pixel ratio), which is why images meant for it should be exported at 2× or 3×.

For a phone this size, a layout should already be at its single-column mobile breakpoint.

Targeting it in CSS

/* Styles for viewports up to the Galaxy A55 */
@media (max-width: 480px) {
  .container { padding-inline: 16px; }
}

/* Exactly the Galaxy A55 in portrait */
@media (width: 384px) and (height: 832px) { /* … */ }

Common things that break at 384px wide

• Fixed-width elements wider than 352px (content minus typical padding) cause horizontal scroll.
• Tap targets under 44×44 CSS px are hard to hit.
• Sticky headers taller than ~15% of 832px eat too much of the screen.
• Text set below 16px triggers zoom-on-focus in form fields on iOS.

Other Samsung sizes