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Ambassador Envelope Co.
6705 Keaton Corporate Pkwy
O'Fallon, MO 63368
Ph: (636) 477-1300
Fax: (636) 477-7648
Toll Free: (800) 325-4510

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Envelope Sizes

envelope sizingEnvelopes are always measured width x length (not including flaps). The width is referred to as the END and the length is referred to as the SIDE. This is where the terminology "Open End" and "Open Side" is derived.

At Ambassador Envelope we manufacture sizes from 1-11/16" x 2-3/4" coin envelopes to 13" x 19" oversized envelopes, and can make envelope sizes up to 15" x 20" (Open End) and 10" x 15" (Open Side). Listed below, however, are the most standard styles in the industry, many of which are stock items at Ambassador.

commercial envelope

Commercial Envelopes

The most common envelopes used for both personal and commercial use.

Commercial Envelopes
Size Height Width
6-1/4 3-1/2 6
6-1/2 3-1/2 6-1/4
6-3/4 3-5/8 6-1/2
7 3-3/4 6-3/4
7-3/4 3-7/8 7-1/2
Monarch 3-7/8 7-1/2
8-5/8 3-5/8 8-5/8
9 3-7/8 8-7/8
10 4-1/8 9-1/2
11 4-1/2 10-3/8
12 4-3/4 11
14 5 11-1/2

announcement envelope

Announcement


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Also referred to as A-Style envelopes, these two side-seam envelopes feature a deep wallet flap and a deep throat. They are often used for greeting cards, photographs, invitations, and promotional pieces.

Announcement Envelopes
Size Measurements
A1 3-5/8 x 5-1/8
A2 4-3/8 x 5-3/4
A6 4-3/4 x 6-1/2
A7 5-1/4 x 7-1/4
A8 5-1/2 x 8-1/8
Slimline (A-Long) 3-7/8 x 8-7/8
A10 6 x 9-1/2

catalog envelope

Catalog Envelopes

Typically used for mailing sales catalogs, brochures, annual reports, and other large printed materials catalog envelopes are open end envelopes that typically must be hand inserted.


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Catalog Size Chart
Size Width Length
1 6 9
1-3/4 6-1/2 9-1/2
3 7 10
6 7-1/2 10-1/2
8 8-1/4 11-1/4
9-3/4 8-3/4 11-1/4
10-1/2 9 12
12-1/2 9-1/2 12-1/2
  9-1/4 14-1/2
  10 12
13-1/2 10 13
14-1/2 11-1/2 14-1/2
15 10 15
15-1/2 12 15-1/2

booklet envelopes

Booklet Envelopes

Also used for mailing sales catalogs, brochures, and other large printed materials, booklet envelopes are open side envelopes that work well with automatic inserting equipment.

Booklet Size Chart
Size Width Length
2-1/2 4-1/2 5-7/8
3 4-3/4 6-1/2
5 5-1/2 8-1/8
6 5-3/4 8-7/8
6-1/2 6 9
6-5/8 6 9-1/2
6-3/4 6-1/2 9-1/2
7-1/4 7 10
7-1/2 7-1/2 10-1/2
9 8-3/4 11-1/2
9-1/2 9 12
10 9-1/2 12-5/8
13 10 13

coin envelopes

Coin Envelopes

Often referred to as coin envelopes because of their popularity in the banking industry, the name coin envelope can actually refer to just about any small open end envelope. Listed below are the most popular coin envelopes.

Standard Coin Envelope Sizes
Size Height Width
00 1-11/16 2-3/4
1 2-1/4 3-1/2
3 2-1/2 4-1/4
4 3 4-1/2
4-1/2 3 4-7/8
5 2-7/8 5-1/4
5-1/2 3-1/8 5-1/2
6 3-3/8 6
7 3-1/2 6-1/2

baronial envelope

Baronial Envelopes

Formal, open side envelopes with a deep, pointed flap and diagonal seam often used for mailing greeting cards, invitations, and personalized stationary.

Baronial Envelopes
Size Height Width
4-Bar 3-5/8 5-1/8
5-Bar 4-1/8 5-1/2
Astor 3-5/8 5-5/8
5-1/2 Bar 4-3/8 5-3/4
Belmont 4-1/4 6-1/4
6-Bar 4-3/4 6-1/2
Jay 5-1/8 6-7/8
Lee 5-1/4 7-1/4

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Ambassador Envelope Co.