Custom Envelope Guide

At Priority Envelope, we simplify the process of designing the perfect envelope for your needs. Whether you’re exploring different window placements to highlight important information or navigating envelope terminology like flaps and seals, we’ve got you covered. Our wide selection of envelope styles, from commercial and booklet to specialty designs, ensures a perfect fit for any project. With this guide, you’ll find everything you need to make informed decisions about envelope customization, helping your mail stand out while ensuring functionality and professionalism.

envelope specs - shipping mailers

Basic Parts of an Envelope

Specifying Window Placement

Location of the Window

Regardless of any printing on your envelope, hold the envelope so the flap is at the top. In this position, measure the window from the left and from the bottom.

Direction of the Window

The direction of the window is determined by which dimension is written first. For example, if the window is horizontal, the size should be written as 1” x 4” (figures A and C). If the window is vertical, the size should be written as 4“ x 1” (figures B and D). If you are unsure about the placement or measurement of a window, consult your Priority Envelope sales or customer service representative.

specs of a package - greeting card envelopes

Window Placement Graphic

priority packaging logo - envelopes for sale

Standard Envelope Terminology

Visually attractive multi-colored custom envelopes have a demonstrated history of successfully delivering an increase in response rates! Present your product directly to home or office where your prospect can see and touch what quality is all about. Call Priority Envelope today for the best custom envelope service in
the envelope manufacturing industry! We are truly excited to help you achieve your goals.

Seam Style

Diag = Diagonal
DSS = Double Side Seam
CS = Center Seam
SS = Single Seam
OSSS = Open Side Double Side Seam
*used for open side and booklets
OSDS = Open Side Diagonal Seam
OECS = Open End Center Seam
*used for open end & catalog
OESS = Open End Side Seam

Flap Style

Wal = Wallet
Crv = Curve
Remit = Remittance
Comm = Commercial
Pnt = Pointed
Sqr = Square
Rnd = Round
Spcl = Special
Bank = Bankers

Envelope Style

Comm = Commercial
OS = Open Side (booklet)
OE = Open End (catalog)
Remit = Remittance
BT = Bangtail
Baro = Baronial
Slv = Sleeve
Coin = Coin
Policy = Policy
Drive Up = Drive Up

Other Terminology

WDO = Window
WW = White Wove
BK = Brown Kraft
BIT = Blue Inside Tint
KIT = Black Inside Tint
SWC = Special Window Charge
BRE = Business Reply Envelope
CRE = Courtesy Reply Envelope
PMS = Pantone Color Matching
System *formulated mixed inks
FCGDB = First Class Green Diamond Border
FCM = First Class Mailer

Get Started Today!

Transform your mailing and packaging solutions today! Discover how Priority Envelope’s advanced services and fast turnaround times can meet all your envelope and custom folding carton needs. Contact us now to get started!