| 1. |
First-determine the "width" of the envelope. The width is always the shorter measurement.
When an envelope opens on the shortest side it is called a catalog envelope or an open end
envelope.
|
| 2. |
Second-determine the "length" of the envelope. The length is always the longer measurement without including the flap. When an envelope opens on the longest side it is called a booklet envelope or an open side envelope.
|
| 3. |
Third-determine the "depth" of the expansion. That is the thickness that the envelope expands to. This is sometimes referred to as the Gusset. |
