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A1 Envelopes - 3 5/8 x 5 1/8 RSVP or Note Card Envelopes
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Antique Ivory Envelopes – A1 Gmund Colors Matt 3 5/8 x 5 1/8 Euro Flap 68T
Euro Flap
68lb Text
$7.00/ per 25 Pack -
Aqua Blue Envelopes – A1 Gmund Colors Matt 3 5/8 x 5 1/8 Euro Flap 81T
Euro Flap
81lb Text
$9.23/ per 25 Pack -
Astrolite Envelopes – A1 PC100 3 5/8 x 5 1/8 Straight Flap 80T
Straight Flap
80lb Text
$7.83/ per 25 Pack -
Beach Sand Brown Envelopes – A1 Gmund Colors Matt 3 5/8 x 5 1/8 Euro Flap 68T
Euro Flap
68lb Text
$7.40/ per 25 Pack -
Black Forest Envelopes – A1 Gmund Colors Matt 3 5/8 x 5 1/8 Euro Flap 68T
Euro Flap
68lb Text
$8.44/ per 25 Pack -
Bubinga Brown Envelopes – A1 Gmund Wood 3 5/8 x 5 1/8 Straight Flap 68T
Straight Flap
68lb Text
$10.84/ per 25 Pack
About A1 Envelopes
A1 envelopes measure 3 5/8 x 5 1/8 inches and are commonly used for RSVP cards, response cards, and small invitations. As the smallest standard A-size envelope, they are ideal for wedding stationery and compact mailings. LCI Paper offers A1 envelopes in a wide range of colors, finishes, and textures, making it easy to match your invitation suite.
Key Features
- A1 envelope size (3 5/8 x 5 1/8 inches)
- Standard size for RSVP and response cards
- Available in a wide variety of colors, finishes, and textures
- Compatible with 3 1/2 x 4 7/8 A1 cards
- Small and versatile format
- Available blank or custom printed
Common Uses for A1 Envelopes
- Wedding RSVP envelopes
- Response cards
- Small invitations
- Note cards
- Save-the-date responses
Size and Compatibility
A1 envelopes are designed to fit A1 cards measuring 3 1/2 x 4 7/8 inches. They are also commonly referred to as 4-bar envelopes, as both names describe the same size.
Printing Options
A1 envelopes can be ordered blank for home printing* or professionally printed through LCI Paper. Custom printing options include return addresses and design elements to match your invitation suite. **Home Printing Disclaimer: Due to the weight, dimensions, unique finish, and layered nature of envelopes, not all printers can effectively print envelopes. We highly encourage you to order samples to test print prior to purchase.
Mailing and Postage
A1 envelopes can be mailed through the United States Postal Service and typically require standard postage when weighing 1 ounce or less.
Frequently Asked Questions About A1 Envelopes
Are A1 envelopes used for wedding RSVPs?
Yes, A1 envelopes are the standard size for wedding RSVP and response cards.
Are A1 envelopes the same as 4-bar envelopes?
Yes, A1 and 4-bar refer to the same envelope size (3 5/8 x 5 1/8 inches).
Can A1 envelopes be mailed?
Yes, they can be mailed through USPS and typically require standard postage.
I need wedding reply envelope etiquette help! How do I properly address my envelopes to include both my fiancé and myself?
First and foremost, the actual mailing address is the most important piece of a RSVP return address, so be sure that the address is correct and recognizable to your local post office. Regarding the names, there are many common ways of doing this - take your pick!-
- Jane Doe and John Smith
- J. Doe & J. Smith
- The Future Mr. and Mrs. Smith
- The Future Mr. and Mrs.
- J & J (in a decorative monogram)












