Envelope Size and Suggested Usage Chart

This chart will help you decide what envelope is best for your mailer, project, photographs, catalog, or letter. Just follow the link to the envelope product and customize or let us help you make it awesome!

Commercial Flap Envelope
Square Flap Envelope
Wallet Flap Envelope
Side Seam Envelope
Policy Document Envelope

Business & 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.

TYPESIZEENCLOSURE 
6 1/4 3.5" x 6" 3.25" x 5.75"  
6 3/4 3.625" x 6.5" 3.5" x 6.25"  
8 5/8 3.625" x 8.625" 3.5" x 8.375"
7 3.75" x 6.75" 3.5" x 6.5"
Monarch (7 3/4) 3.875" x 7.5" 3.75" x 7.25"  
9 3.875" x 8.875" 3.75" x 8.675"  
9 (policy) 4" x 9" 3.75" x 8.5"
10 4.125" x 9.5" 4" x 9.25"  
DL 4.313" x 8.625" 4.125" x 8.375"  
11 4.5" x 10.375" 4.25" x 10.125"  
12 4.75" x 11" 4.5" x 10.75"
14 5" x 11.5" 4.75" x 11.25"
16 6" x 12" 5.75" x 11.75"
Booklet Envelope

Booklet


This style is ideal for annual reports, brochures, sales materials, and more. The open side makes it acceptable for automatic insertion.

TYPESIZEENCLOSURE 
3 4.75" x 6.5" 4.5" x 6"  
4 1/2 5.5" x 7.5" 5.25" x 7"  
5 5.5" x 8.125" 5.25" x 7.625"  
6 5.75" x 8.875" 5.5" x 8.375"
6 1/2 6" x 9" 5.75" x 9"  
6 5/8 6" x 9.5" 5.75" x 9"  
6 3/4 6.5" x 9.5" 6.25" x 9"  
7 1/4 7" x 10" 6.75" x 9.5"  
7 1/2 7.5" x 10.5" 7.25" x 10"  
9 8.75" x 11.5" 8.5" x 11"  
9 1/2 9" x 12" 8.75" x 11.5"  
10 9.5" x 12.625" 9.25" x 12.125"  
13 10" x 13" 9.75" x 12.5"  
Catalog Envelope

Catalog


Center seam makes this style more durable for mailing heavy-weight materials. These envelopes can not be processed through inserting equipment or run through a laser printer.

TYPESIZEENCLOSURE 
1 6" x 9" 5.75" x 8.75"  
1 3/4 6.5" x 9.5" 6.25" x 9.25"  
3 7" x 10" 6.75" x 9.5"  
6 7.5" x 10.5" 7.25" x 10"  
8 8.25" x 11.25" 8" x 10.75"
9 3/4 8.75" x 11.25" 8.5" x 10.75"
10 1/2 9" x 12" 8.75" x 11.5"  
12 1/2 9.5" x 12.5" 9.25" x 12"  
13 1/2 10" x 13" 9.75" x 12.5"  
15 10" x 15" 9.75" x 14.5"
15 1/2 12" x 15.5" 11.75" x 15"  
Square Flap Envelope

Square


This unusual shape attracts attention to its contents. Square envelopes are nonstandard and require additional postage to mail.

TYPESIZEENCLOSURE 
5" 5" x 5" 4.75" x 4.75"  
5 ½" 5.5" x 5.5" 5.25" x 5.25"  
6" 6" x 6" 5.75" x 5.75"  
6 ½" 6.5" x 6.5" 6.25" x 6.25"  
7" 7" x 7" 6.75" x 6.75"  
7 ½" 7.5" x 7.5" 7.25" x 7.25"  
8" 8" x 8" 7.75" x 7.75"  
8 ½" 8.5" x 8.5" 8.25" x 8.25"  
9" 9" x 9" 8.75" x 8.75"  
9 ½" 9.5" x 9.5" 9.25" x 9.25"  
10" 10" x 10" 9.75" x 9.75"
13 ½" 13.5" x 13.5" 13.25" x 13.25"
Baronial Envelope

Baronial


Deep pointed flap traditionally used for formal announcements and invitations. Not recommended for machine insertion.

TYPESIZEENCLOSURE 
Professional* 2.125" x 3.625" 2" x 3.5"  
#16 (Mrs.)* 2.375" x 3.375" 2.25" x 3.125"  
#17 (Mr. & Mrs.)* 2.6875" x 3.6875" 2.5625" x 3.5625"  
Gladstone* 3.563" x 5.562" 3.375" x 5.375"  
4-Bar 3.625" x 5.125" 3.475" x 4.875"  
5½-Bar 4.375" x 5.75" 4.25" x 5.5"  
6-Bar/Walton Outside 4.75" x 6.5" 4.625" x 6.25"  
Lee 5.25" x 7.25" 5.125" x 7"  
Linwood/Monona Inside 5.25"" x 7.5"" 5" x 7.25"  
Monona Outside 5.5" x 7.75" 5.25" x 7.5"  
* This size is too small to mail.
Announcement Envelope

Announcement


Also called A-style, this contemporary design is ideal for photographs, greeting cards, small booklets, and promotional pieces. Do not confuse the A-4 size with metric A4 paper, which fits into a DL size Commercial envelope.

TYPESIZEENCLOSURE 
A-2 4.375" x 5.75" 4.25" x 5.5"  
A-6 4.75" x 6.5" 4.625" x 6.25"  
A-7 5.25" x 7.25" 5" x 7"  
A-8 5.5" x 8.125" 5.25" x 7.75"  
A-9 5.75" x 8.875" 5.5" x 8.625"  
A-10 6" x 9.5" 5.75" x 9.25"