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Standard Business Envelopes
Envelope Styles, Sizes and Measurements

Standard “stock” envelopes are available in a multitude of different sizes, shapes, colors and types of paper. Envelopes can be custom-made to meet specific requirements, although they are expensive in small quantities.


Commercial Business Envelopes
Styles, Sizes and Measurements


#10 Envelopes
The Standard Business Envelope Size

business envelopes types

The most popular business envelope size in the USA is a #10 Envelope. They are usually made with a commercial flap (see illustration on the left) and have diagonal or side seams (ideal for machine insertion).

Other commercial envelope options include the wallet flap, square flap and the policy envelope style. Wallet flaps provide a larger imprinting area. Square flaps are contemporary, but are not recommended for machine insertion. Commercial envelopes are most commonly constructed from a 24# white wove paper stock.

envelope window size and position

Standard Window Envelope Position

All standard commercial envelope sizes with a window have the same window size and position. Measuring 4½″ wide and 1⅛″ deep, the window is positioned on the left-hand side ⅞″ from the left and ½″ from the bottom of the envelope edges.

commercial business envelope Other Commercial Business Envelope Sizes
In addition to the standard #10 size, commercial business envelopes are available in many other Sizes, constructed with a diagonal or side seam on a 24# white wove paper.
Envelope Type Envelope Size Envelope Type Envelope Size
#6¼ 3½″ x 6″ #9 (policy) 4″ x 9″
#6¾ 3⅝″ x 6½″ #10 4⅛″ x 9½″
#8⅝ 3⅝″ x 8⅝″ #11 4½″ x 10⅜″
#7 3¾″ x 6¾″ #12 4¾ ″ x 11″
#7¾ (monarch) 3⅞″ x 7½″ #14 5″ x 11½″
#9 3⅞″ x 8⅞″ #16 6″ x 12″


Catalog and Booklet Envelope Sizes
Styles, Sizes and Measurements



Booklet Envelope catalog envelope

Catalog & Booklet Envelopes Standard Sizes Chart

Catalog envelopes open on the end (the short way), whereas booklet envelopes open on the top (the longest way). Both are constructed with a center seam, making them suitable for automatic insertion machines and more durable for mailing heavy-weight materials. Paper is usually a 24# or a thicker 28# bond stock. White, manila, gray kraft and brown kraft are standard paper stock color options
Catalog Envelope Sizes Booklet Envelope Sizes
6″ x 9″ 9½″ x 12½″ 4¾″ x 6½″ 7″ x 10″
6½″ x 9½″ 10″ x 13″ 5½″ x 7½″ 7½″ x 10½″
7″ x 10″ 11½″ x 14½″ 5½″ x 8⅛″ 8¾″ x 11½″
7½″ x 10½″ 10″ x 15″ 5¾″ x 8⅞″ 9″ x 12″
8¼″ x 11¼″ 12″ x 15½″ 6″ x 9″ 9½″ x 12⅝″
8¾″ x 11½″   6″ x 9½″ 10″ x 13″
9″ x 12″   7″ x 10″ 12″ x 15½″


Announcement & Invitation Envelopes
“A” Style & Baronial Envelope Sizes and Measurements


Announcements with square-flaps,  "A" envelopes Baronial Envelope

A-style envelopes have a squared-off flap

“A” style envelopes are commonly made with text weight papers and come in a wide range of colors and textures. They have side seams and a contemporary square flap.
Type Envelope Size
A-2 4⅜″ x 5¾″
A-6 4¾″ x 6½″
A-7 5¼″ x 7¼″
A-8 5½″ x 8⅛″
A-9 5¾″ x 8¾″
A-10 6″ x 9½″

Baronial envelopes have a triangular flap

Baronial envelopes are traditional for formal business announcements, invitations & greeting cards. They have deep, pointed flaps making them non-recommended for machine insertion.
Type Envelope Size Type Envelope Size
2 Bar 4¼″ x 3.1875″ 6 Bar 6½″ x 4¾″
4 Bar 5⅛″ x 3⅝″ Gladstone 5⅝″ x 3⅝″
5 Bar 5⅝″ x 4⅛″ Astor 5⅝″ x 3⅝″
5¼ Bar 5¼″ x 4¼″ Lee 7¼″ x 5⅛″
5½ Bar 5⅝″ x 4⅜″


Square Envelopes


square announcement envelopes

Square Envelopes
Standard Square Envelope Types & Sizes

Square envelopes are used primarily with announcements, advertising, and specialty greeting cards or other mailings where the sender wants an unusual shaped envelope to draw attention to the contents.
Envelope Type Envelope Size Envelope Type Envelope Size
5″ 5″ x 5″ 7½″ 7½″ x 7½″
5½″ 5½″ x 5½″ 8″ 8″ x 8″
6″ 6″ x 6″ 8½″ 8½″ x 8½″
6½″ 6½″ x 6½″ 9″ 9″ x 9″
7″ 7″ x 7″ 9½″ 9½″ x 9½″


Coin Envelopes


coin envelope

Coin Envelopes
Envelope Types & Sizes

A Coin Envelope is a small open end envelope, usually with center seam construction. Coin envelopes are often used for small parts, jewelry, coins, etc.
Envelope Type Envelope Size Envelope Type Envelope Size
1 2¼″ x 3½″ 5 2⅞″ x 5¼″
3 2½″ x 4¼″ 3⅛″ x 5½″
4 3″ x 4½″ 6 3⅜″ x 6″
3″ x 4⅞″ 7 3½″ x 6½″

PDF

Download the
Commercial Envelope Reference Guide








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