Sizing images for an email that works on mobile

Decide the maximum display width in the email, then export a copy at a suitable resolution. Images far wider than the layout add download weight without helping readers.

Keep text out of images when possible; if it must be inside, inspect it on a phone. After resizing, compare format and compression settings, then send a test email. Check loading speed, cropping, and clarity in the actual client, not only the editor preview.

What width will the image occupy?