It’s not as simple as you might think!

Windows envelopes show content from the inside.  Usually that just means the recipient’s address.  Sometimes, as in the case of full view windows (large display windows) it can show a graphic image or something that catches the eye.

Regardless of the purpose of the window, there is a proper method for measuring and specifying the window and where it’s placed.  “Proper” in this sense just means a way in which everyone in the process, the customer and the vendor, can know exactly what each other is talking about.  The ultimate objective is getting it right and making the process as smooth as possible.

There are two factors to consider here: first, the size of the window itself.  This is simply expressed as the height and the width.  The window height is the “north/south” dimension with the flap of the envelope at the top as you’re viewing it.  The window width is the “east/west” dimension also with the flap on top.  So in the example below, if the window height was 1” and the window width was 3”, it would simply be expressed as 1” x 3”.  (Note: if the window is placed at a right angle to the flap, it’s then referred to as a “vertical window” and is handled differently.  More on that in a subsequent blog)

The second factor is the placement of the window; i.e. where it sits in relation to the edges.  Window positions are always measured from the left and from the bottom to the closest edge of the window from either edge of the envelope.  So in the example shown here, let’s say the window is placed 2” from the left and 1” from the bottom.  The proper way to express the window specifications is as follows:

Window – 1” x 3”, placed 2” from the left and 1” from the bottom

Stating it in that way will tell your vendor exactly what you want.  It eliminates all potential confusion which could result in you not receiving an accurate estimate.

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