- The bit depth can be 72dpi. The maximum width of a full-size image is 640px, so full size should be 640px wide or double up, 1280px for full power in retina displays. The weight can never exceed 10mb because the total weight of an email should never exceed 10mb (some email clients will not let that email through).
A normal full size image is normally about 200k.
- The file formats for images are .jpg, .gif or .png.
- Animated GIFs are okay, but certain email clients will display a static image.