1) Business & Correspondence Envelopes:
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.
 |
 |
 |
 |
 |
| Envelope Type | Size | Enclosure |
| 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" |
2) Booklet Envelopes:
This style is ideal for annual reports, brochures, sales materials, and more. The open side makes it acceptable for automatic insertion.
| Envelope Type | Size | Enclosure |
| 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" |
3) Catalog Envelopes:
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.
| Envelope Type | Size | Enclosure |
| 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" |
| 14 1/2 | 11.5" x 14.5" | 11.25" x 14" |
| 15 | 10" x 15" | 9.75" x 14.5" |
| 15 1/2 | 12" x 15.5" | 11.75" x 15" |
4) Square Envelopes:
This unusual shape attracts attention to contents. Square envelopes are nonstandard and require additional postage to mail.
| Envelope Type | Size | Enclosure |
| 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" |
5) Baronial Envelopes:
Deep pointed flap traditionally used for formal announcements and invitations. Not recommended for machine insertion.
| Envelope Type | Size | Enclosure |
| Professional* (too small to mail) | 2.125" x 3.625" | 2" x 3.5" |
| #16 (Mrs.)* (too small to mail) | 2.375" x 3.375" | 2.25" x 3.125" |
| #17 (Mr. & Mrs.)* (too small to mail) | 2.6875" x 3.6875" | 2.5625" x 3.5625" |
| Gladstone* (too small to mail) | 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" |
6) Announcement A-Style Envelopes:
This contemporary design is idea 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.
| Envelope Type | Size | Enclosure |
| A2 | 4.375" x 5.75" | 4.25" x 5.5" |
| A4 | 4.25" x 6.25" | 4 "x 6" |
| A6 | 4.75" x 6.5" | 4.625" x 6.25" |
| A7 | 5.25" x 7.25" | 5" x 7" |
| A8 | 5.5" x 8.125" | 5.25" x 7.75" |
| A9 | 5.75" x 8.75" | 5.5" x 8.5" |
| A10 | 6" x 9.5" | 5.75" x 9.25" |
