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Envelope Information
Below is an guide to envelopes, it explains uses and offers specs on all common types of envelopes.
To download a 
please click here.
Business and Correspondence
Widely used for business and personal correspondence. Commercial and Side Seam flap styles are ideal for machine insertion. Wallet flaps provide a large area ideal for imprinting. Square flaps are contemporary, but not recommended for machine insertion.
Type
6 ¼
6 ¾
8 5/8
7
Monarch (7 ¾)
9
9 (policy)
10
DL
11
12
14
16
Size
3.5x6
3.625x6.5
3.625x8.625
3.75x6.75
3.875x7.5
3.875x8.875
4x9
4.125x9.5
4.313x8.625
4.5x10.375
4.75x11
5x11.5
6x12
Enclosure
3.25x5.75
3.5x6.25
3.5x8.375
3.5x6.5
3.75x7.25
3.75x8.675
3.75x8.5
4x9.25
4.125x8.375
4.25x10.125
4.5x10.75
4.75x11.25
5.75x11.75
Booklet
This style is ideal for annual reports, brochures, sales materials, and more. The open side makes it acceptable for automatic insertion.
Type
3
4 1/2
5
6
6 1/2
6 5/8
6 3/4
7 1/4
7 1/2
9
9 1/2
10
13
Type
4.75 x 6.5
5.5 x 7.5
5.5 x 8.125
5.75 x 8.875
6 x 9
6 x 9.5
6 x 9.5
7 x 10
7.5 x 10.5
8.75 x 11.5
9 x 12
9.5 x 12.625
10 x 13
Type
4.5 x 6
5.25 x 7
5.25 x 7.625
5.5 x 8.375
5.75 x 9
5.75 x 9
6.25 x 9
6.75 x 9.5
7.25 x 10
8.5 x 11
8.75 x 11.5
9.25 x 12.125
9.75 x 12.5
Catalog
Center seam makes this style more durable for mailing heavy-weight materials. These envelopes cannot be processed through inserting equipment or run through a laser printer.
Type
1
1 3/4
3
6
8
9 3/4
10 1/2
12 1/2
13 1/2
14 1/2
15
15 1/2
Size
6 x 9
6.5 x 9.5
7 x 10
7.5 x 10.5
8.25 x 11.25
8.75 x 11.25
9 x 12
9.5 x 12.5
10 x 13
11.5 x 14.5
10 x 15
12 x 15.5
Enclosure
5.75 x 8.75
6.25 x 9.25
6.75 x 9.5
7.25 x 10
8 x 10.75
8.5 x 10.75
8.75 x 11.5
9.25 x 12
9.75 x 12.5
11.25 x 14
9.75 x 14.5
11.75 x 15
Square
This unusual shape attracts attention to contents. Square envelopes are nonstandard and require additional postage to mail.
Type
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
13 1/2
Size
5 x 5
5.5 x 5.5
6 x 6
6.5 x 6.5
7 x 7
7.5 x7.5
8 x 8
8.5 x 8.5
9 x 9
9.5 x 9.5
10 x 10
13.5 x 13.5
Enclosure
4.75 x 4.75
5.25 x 5.25
5.75 x 5.75
6.25 x 6.25
6.75 x 6.75
7.25 x 7.25
7.75 x 7.75
8.25 x 8.25
8.75 x 8.75
9.25 x 9.25
9.75 x 9.75
13.25 x13.25
Baronial
Deep pointed flap traditionally used for formal announcements and invitations. Not recommended for machine insertion.
Type
Professional*
#16 (Mrs.)*
#17 (Mr. and Mrs.)*
Gladstone*
4-Bar
5 1/2-Bar
6-Bar/Walton
Lee
Monona Inside
Monona Outside
* This size is too small to mail.Size
2.125 x 3.625
2.375 x 3.375
2.6875 x 3.6875
3.563 x 5.562
3.625 x 5.125
4.375 x 5.75
4.75 x 6.5
5.25 x 7.25
5.25 x 7.5
5.5 x 7.75
Enclosure
2 x 3.5
2.25 x 3.125
2.5625 x 3.5625
3.375 x 5.375
3.475 x 4.875
4.25 x 5.5
4.625 x 6.25
5.125 x 7
5 x 7.25
5.25 x 7.5
Announcement
Also called A-style, this contemporary design is ideal for photographs, greeting cards, small booklets, and promotional pieces.
Type
A-1
A-2
A-6
A-7
A-8
A-9
A-10
Size
3.625 x 5.125
4.375 x 5.75
4.75 x 6.5
5.25 x 7.25
5.5 x 8.125
5.75 x 8.875
6 x 9.5
Enclosure
3.475 x 4.875
4.25 x 5.5
4.625 x 6.25
5 x 7
5.25 x 7.75
5.5 x 8.625
5.75 x 9.25
*** All Dimensions are in inches
