Gmail "clips" emails that are greater than 102KB in size. If your email has been clipped, you will see a message like the one below:
When recipients click View entire message, they will be brought to a page where they can read your email in full.
Having your emails clipped is undesirable from a marketing standpoint and can also negatively impact your email deliverability. What's more, when an email is clipped, the tracking pixel (used to calculate open rate) will also be clipped, and opens will not be tracked correctly.
This means you'll want to ensure that your email code is less than 102KB, which includes all text, HTML styling, links, images, etc. For reference, each character of code that makes up an email is about 1-2 bytes.
Image size does not impact the size of an email, since images are loaded from an external source (i.e. your Klaviyo image library), but deleting an image completely will reduce the size of an email. That said, GIFs with many frames can increase the size of an email, since each frame is loaded as an individual image.
To test the size of an email, send a one-off email (not a preview) to one of your Gmail addresses to see if the message is clipped. If it is, view the source code of the email, copy and paste it into a document, save it, and then view the file size of the document. You can then edit the email accordingly to decrease the size.
By default, Klaviyo adds link tracking to your emails, which increases the size of the email. This is why it is important to send your test email as a campaign rather than a preview email, since we only add link tracking in live campaigns. The fewer links you have in your email, the less code Klaviyo will add.
Other Reasons Your Emails May Be Clipped
- You sent multiple emails with the same subject line. Gmail automatically combines emails with the same subject lines into threads. This means that some of the content will be hidden once you exceed the 102KB threshold. This shouldn't be an issue unless you are testing the length of an email, in which case you can simply change the subject line. Since your customers won't be receiving multiple emails from you with the same subject line, this shouldn't be an issue on their end.
- You copy and pasted text from an external source. If you copy and pasted text from somewhere else, like your blog, you might have copy and pasted some extra styling as well. You can check this by viewing the Source area of a text block. If there is extra formatting, simply highlight the text and remove it.