The dimensions of an email signature, measured in picture elements, directly impact its visual presentation and file size. For example, an email signature designed at 600 pixels wide and 150 pixels high defines the area within which all signature content will be displayed.
Proper consideration of these dimensions helps ensure readability, prevents distortion, and contributes to smaller overall email sizes, which is particularly important for mobile viewing and efficient email delivery. Historically, standard screen resolutions influenced the initial adoption of certain dimensional standards, adapting over time with evolving display technologies.