Website Logo Size and Proportional Scaling
There is no single correct website logo size. Learn how to size a logo for your layout, keep its proportions locked, and choose vector or raster files that scale cleanly.
Contents
The Short Answer
No universal pixel dimension is correct for a website logo. The right size depends on your site's header or navigation layout, the logo's own shape, and the screens it will appear on. What matters more than any fixed number is proportional scaling: the logo should change size as one unit, with width and height kept in the same ratio, so it never looks stretched or squashed.
No confirmed benchmark figures, specifications or studies were supplied for this article, so it does not give recommended pixel values. The guidance below rests on general, verifiable principles of how logo files and web layouts behave.
What "Logo Size" Means on a Website
"Logo size" can refer to two different things, and they are easy to confuse:
- Display size: how large the logo appears on the page, controlled by the layout and its styling rules.
- File size and resolution: the dimensions and detail stored in the logo file itself, which determine how sharp the logo looks at a given display size.
A vector logo has no fixed pixel resolution, so its display size can change without any loss of sharpness. A raster logo, such as a PNG or JPEG, is a fixed grid of pixels. Shown larger than its stored dimensions, it softens or blurs.
How Proportional Scaling Works
Every logo has an aspect ratio, the relationship between its width and height. A wide horizontal lockup and a compact square mark have very different ratios. Proportional scaling preserves that ratio at every size. In practice, you usually constrain one dimension and let the other follow automatically.
For a horizontal header, a common approach is to set the logo's height and let its width adjust. Adding a maximum width keeps the logo from overflowing narrow screens:
.site-logo img {
height: 48px; /* example value only; set to suit your header */
width: auto; /* width follows the logo's aspect ratio */
max-width: 100%; /* prevents overflow on narrow screens */
}The pixel value above is an illustration, not a recommendation. The important parts are width: auto and the maximum-width limit, which together keep proportions intact. Setting fixed values for both width and height that don't match the logo's ratio is the most common cause of distortion.
Vector Artwork, Embedded Rasters and Raster Previews
A logo only scales cleanly if it is truly vector artwork. Three situations are often mistaken for one another:
| File situation | What it contains | Scaling behavior |
| True vector artwork | Shapes defined as paths and curves | Stays sharp at any display size |
| Vector file with an embedded raster | A pixel image placed inside a vector container | The embedded image blurs when enlarged, even though the file format is vector |
| Raster preview or export | A pixel image generated from the artwork | Sharp only up to its stored resolution |
A file extension alone does not confirm editable vector paths. An SVG, PDF, AI or EPS file can still contain an embedded bitmap or text that hasn't been converted to outlines. The reliable check is to open the file in a vector editor and confirm that the logo's elements are selectable paths rather than a single placed image.
Choosing a File Format for Web Display
- SVG: Usually the best choice for a website logo when the artwork is genuinely vector. One file serves every display size and screen density.
- PNG: A practical fallback when SVG isn't possible or the logo includes photographic or textured elements. Export it larger than its largest display size so it stays crisp on high-density screens. Many sites supply at least twice the display dimensions.
- JPEG: Generally a poor fit for logos. It doesn't support transparency, and its compression can blur hard edges and flat color.
Responsive Layouts and Logo Variants
Proportional scaling can only go so far. A wide logo shrunk to fit a small mobile header may become too small to read, even though its proportions are correct. Many brands handle this by keeping several variants, such as a full horizontal lockup, a stacked version and a standalone symbol, and switching between them at different screen widths. Each variant still scales proportionally within its own range.
Clear space matters too. If the brand's guidelines define a minimum margin around the logo, that margin should scale with the logo rather than shrinking to zero on small screens. The browser tab icon (favicon) is a separate, very small asset and usually needs its own simplified artwork, not a scaled-down copy of the full logo.
A Note on Third-Party Logos
Being able to download a logo file doesn't grant permission to change it. Resizing a client's or partner's logo proportionally is normally expected. Altering its proportions, colors, typography or components, or using it in ways its owner hasn't approved, may conflict with brand guidelines, font licenses or trademark rights. Check the owner's usage terms before going beyond simple proportional scaling.
What This Article Can't Settle
Without specific evidence about your site, logo or platform, this overview can't give exact display dimensions, confirm whether a particular file contains real vector paths, or describe how a specific theme or website builder handles logo uploads. For those answers, consult your layout's design specifications, inspect the logo file directly, and check your platform's documentation for its logo field.