We recommend a logo take up 150px - 300px of width, but be saved at 2x the resolution so 300px - 600px. Especially with the prevalence of mobile email, this seems wise. In general, I would recommend keeping your signature smaller so that it appears nicely on both desktop and mobile devices. So in today’s world there isn’t always a clear answer for which to go with. This is partially good because it means that the signature may not appear broken, but it can also be bad because elements within the signature can become too tiny to read or be useful. Many mobile email clients will scale email signatures down to their screen size. These devices are typically held in portrait mode and tend to render emails at around 400 pixels, but the actual width can vary greatly. Mobile: According to Litmus, 42% of email opens are now on a mobile device.Because of this, many people choose the safe route of sticking to 600.

It could be around 600 pixels or it could be thousands. This means you have no idea how much room will actually be left to view your email. They can expand and shrink their windows at will.

Big Monitors: Today’s desktops come in many sizes, and people don’t keep their windows full screen anymore.

This standard is still an important one today, but it is not as simple as it used to be for a few reasons: This left about 600 pixels with a little bit of margin on each side. This was during a time when you could basically guarantee that every screen was about 1024 pixels wide, and the email clients that everyone was using had some kind of sidebar that took up about 1/3 of the screen. You could use an email signature width of up to 600 pixels, but if possible I would recommend something below 320 pixels wide.įor a long time the standard width for developing any kind of html email was 600px.

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