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Pixel Perfect Email Images

We live in an age of visual culture, where adding great images to your email is crucial to open and click rates. Ensuring your template images look great across all devices and all email clients requires a bit of attention. Today, we’re answering a few big questions about using images in your email marketing.


Why do my images have to be so big?

You’ll notice in Lasso’s new Design Editor, we have recommended sizes for all of our image blocks. You’ll also notice we’ve suggested a minimum size that is larger than the size displayed content block. Here’s why: Some smartphones, tablets, and laptops feature high-density screens and retina displays that have a higher ratio of pixels per inch. Smaller images can appear pixilated on these high-quality displays.

Email Image Sizes

To ensure your images render clearly on all screens, we recommend doubling the size needed for the content block. For example, if a content block image is 260 x 260, you would upload a 72 ppi image that is 520 x 520 pixels.


Why do my images load so slowly?

Sometimes, when you open an email in your inbox, an image seems to take an unusually long time to load on your screen. Large files load slowly in some email clients. The larger the file, the slower it loads. We recommend keeping your image file size less than 1MB.


How can I resize my images?

If you don’t have access to a photo editing software such as Photoshop or Corel Paintshop, there are many free and subscription based online sources that allow you to crop, re-size or edit your image. Some of our favorites are fotor, BeFunky, and PicMonkey.


Do I have to resize my images before inserting them into the design editor?

No. Lasso’s Design Editor will automatically scale your image to the width of the content block. Keep in mind, if your image is too small, it will appear pixilated; if the file size is too large, it may load slowly in your registrant’s inbox.

The Design Editor will also automatically adjust the height in proportion to the width. This means, it won’t squish, stretch, or distort your image. This is an important feature when using the 2 column image block. We recommend that both left and right images are the same dimensions to ensure a uniform and balanced look.

Email Image Dimensions


What’s the best format for my images?

When you save your images, we recommend using PNG or JPG format. A JPG is best for photos and images that use a lot of color variety. A PNG file can have a transparent background, making it an ideal format for logos when placing them on a colored background.

Go forth, image ninja! It’s time to put this newly found knowledge to use and create some visually amazing email marketing.


Download Lasso's Guide to Email Marketing

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