Pertaining to dimension.

(used when describing the different levels of existence)

A mailing piece with some heft and immediate visual presence, such as a box or tube, that often contains a gift or premium for the recipient. While dimensionals are expensive to produce and mail, they can be the most cost-effective way to reach difficult audiences, such as C-level executives or very wealthy consumers. Also known as "lumpy mail."

relative to a dimension.

of or relating to dimensions

having dimension--the quality or character or stature proper to a person; "never matures as a dimensional character; he is pasty, bland, faceless"- Norman Cousins

Letters with depth.

measurement in one direction. A two-dimensional (2-D) work of art has the two dimensions of length and width; a three-dimensional (3-D) work of art has the three dimensions of length, width, and depth.

Lowest pressure needed to meet your pre-determined size