Guides / What size should sponsor logos be?
What size should sponsor logos be?
There are two separate questions here: what to ask your sponsors for, and what to export once you have it. They have different answers.
What to ask sponsors for
Ask for a PNG with a transparent background, at least 1000 pixels on its longest edge. That is big enough for anything up to A3 and small enough that nobody argues about emailing it.
If they have a vector file, whether SVG, EPS, AI or a PDF export, take that instead. Vector scales to any size without going soft, and a sponsor's design agency will have one.
What you do not want is a logo lifted from their website header. Those are often 200 pixels wide, which is fine on screen and falls apart in print.
Export sizes for print
Print wants 300 dots per inch. At that resolution: A4 is 2480 × 3508 pixels, A3 is 3508 × 4961, A2 is 4961 × 7016.
If you are sending to a commercial printer, ask whether they want bleed. Most want 3mm beyond the trim on each edge, which makes A4 216 × 303mm rather than 210 × 297.
Export sizes for screen
A slide in a 16:9 deck is 1920 × 1080. Export at exactly that and the image fills the slide with no scaling and no soft edges. For projection onto a large screen, 3840 × 2160 gives you headroom.
For a web page, 1600 pixels wide is ample. For social, a 1500 × 1500 square travels further than a landscape image.
How big each logo ends up
On a sheet of 40 logos at A3, each one lands around 40 to 50mm wide. That is large enough for a brand name and too small for a strapline, which is worth knowing before someone complains their tagline is unreadable.
On a projected slide, assume the audience is ten metres back. A rule of thumb for legibility is one centimetre of text height per three metres of viewing distance, so text needs to be around 3 to 4cm tall on the screen. That is why 70 logos on one slide rarely works, and splitting across two is usually the right call.
Do this automatically
Sponsor Wall does the sizing, background removal and tiering described above, and exports every format at once. Free to organise and preview.