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A1 Envelopes

 

A1 envelopes measure 3 5/8 x 5 1/8 and are commonly used to mail RSVP cards for weddings and invitations. A1 envelopes are offered in a rainbow of colors, in fact close to 100 colors to choose from. You can order A1 envelopes printed by LCI Paper or blank to print yourself (free A1 envelope templates available). Mix and match with 3 1/2 x 4 7/8 A1 blank cards for the perfect note or RSVP card and envelope set.

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A1 Ice Silver Metallic Straight Flap Envelopes, Curious Metallics 80lb
5 More Colors >
 
Ice Silver Curious Metallics Envelopes 3 5/8 x 5 1/8 - Straight Flap - Metallic
$7.14per 25 Pack
SALE
69% OFF
A1 Menta Straight Flap Envelopes, Gmund Colors Matt 68lb
 
A1 Menta Straight Flap Envelopes, Gmund Colors Matt 68lb
$2.03per 25 Pack
SALE
38% OFF
A1 Max White Cotton Old World Flap Envelopes, Gmund Cotton 74lb
 
A1 Max White Cotton Old World Flap Envelopes, Gmund Cotton 74lb
$4.92per 25 Pack
Radiant White Pointed Flap Envelopes, A1  3 5/8 x 5 1/8, LCI Smooth 70lb
 
Radiant White LCI Smooth Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Smooth
$5.12per 25 Pack
A1 Pure White Felt Straight Flap Envelopes, LCI Felt 70lb
 
Pure White LCI Felt Envelopes 3 5/8 x 5 1/8 - Straight Flap - Felt
$8.85per 25 Pack
A1 Ultimate White Linen Straight Flap Envelopes, LCI 70lb
 
Ultimate White LCI Linen Envelopes 3 5/8 x 5 1/8 - Straight Flap - Linen
$7.07per 25 Pack
A1 Bubinga Wood Grain Straight Flap Envelopes, Gmund Wood 68lb
 
Bubinga Wood Grain Envelopes 3 5/8 x 5 1/8 - Straight Flap - Wood Grain
$9.37per 25 Pack
A1 Rose Quartz Metallic Straight Flap Envelopes, Stardream 81lb
11 More Colors >
 
Rose Quartz Stardream Envelopes 3 5/8 x 5 1/8 - Straight Flap - Metallic
$6.02per 25 Pack
Radiant White Straight Flap Envelopes, A1  3 5/8 x 5 1/8, LCI Smooth 70lb
 
Radiant White LCI Smooth Envelopes 3 5/8 x 5 1/8 - Straight Flap - Smooth
$5.12per 25 Pack
A1 Red Hot Euro Flap Envelopes, Poptone 70lb
17 More Colors >
 
Red Hot Poptone Envelopes 3 5/8 x 5 1/8 - Euro Flap - Matte
$46.49per 250 Pack
A1 Brilliant White Felt Pointed Flap Envelopes, Royal Sundance 80lb
 
Brilliant White Royal Sundance Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Felt
$290.01per 2500 Pack
A1 100 PC White Felt Straight Flap Envelopes, Royal Sundance 70lb
 
100 PC White Royal Sundance Envelopes 3 5/8 x 5 1/8 - Straight Flap - Felt
$179.05per 2500 Pack
A1 100 PC White Felt Straight Flap Envelopes, Royal Sundance 80lb
 
100 PC White Royal Sundance Envelopes 3 5/8 x 5 1/8 - Straight Flap - Felt
$196.72per 2500 Pack
A1 Opal Metallic Euro Flap Envelopes, Stardream 81lb
 
Opal Stardream Envelopes 3 5/8 x 5 1/8 - Euro Flap - Metallic
$6.02per 25 Pack
Radiant White Euro Flap Envelopes, A1  3 5/8 x 5 1/8, LCI Smooth 70lb
 
Radiant White LCI Smooth Envelopes 3 5/8 x 5 1/8 - Euro Flap - Smooth
$5.63per 25 Pack
A1 Beach Sand Euro Flap Envelopes, Gmund Colors Matt 68lb
23 More Colors >
 
Beach Sand Gmund Colors MATT Envelopes 3 5/8 x 5 1/8 - Euro Flap - Matte
$6.80per 25 Pack
A1 Light Sky Blue Euro Flap Envelopes, Gmund Colors Matt 81lb
8 More Colors >
 
Light Sky Blue Gmund Colors MATT Envelopes 3 5/8 x 5 1/8 - Euro Flap - Matte
$6.80per 25 Pack
A1 Blast-Off Blue Pointed Flap Envelopes, Astrobright 60lb
18 More Colors >
 
Blast-Off Blue Astrobright Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Matte
$261.94per 2500 Pack
A1 Cosmic Orange Pointed Flap Envelopes, Astrobright 70lb
 
Cosmic Orange Astrobright Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Matte
$273.00per 2500 Pack
A1 Warm White Felt Pointed Flap Envelopes, Royal Sundance 70lb
 
Warm White Royal Sundance Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Felt
$266.55per 2500 Pack
A1 Aged Straight Flap Envelopes, Astroparche 60lb
2 More Colors >
 
Aged Astroparche Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$185.66per 2500 Pack
A1 White Smooth Tactile Straight Flap Envelopes, Plike 95lb
 
White Plike Envelopes 3 5/8 x 5 1/8 - Straight Flap - Smooth Tactile
$322.52per 2000 Pack
A1 Black Smooth Tactile Pointed Flap Envelopes, Plike 95lb
 
Black Plike Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Smooth Tactile
$373.38per 2000 Pack
A1 Blast-Off Blue Straight Flap Envelopes, Astrobright 60lb
18 More Colors >
 
Blast-Off Blue Astrobright Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$166.43per 2500 Pack
A1 Cosmic Orange Straight Flap Envelopes, Astrobright 70lb
 
Cosmic Orange Astrobright Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$185.44per 2500 Pack
A1 Aged Pointed Flap Envelopes, Astroparche 60lb
2 More Colors >
 
Aged Astroparche Envelopes 3 5/8 x 5 1/8 - Pointed Flap - Matte
$280.03per 2500 Pack
A1 No Color Euro Flap Envelopes, Gmund No Color No Bleach 81lb
 
No Color No Color No Bleach Envelopes 3 5/8 x 5 1/8 - Euro Flap - Organic
$6.67per 25 Pack
A1 Purple Light Straight Flap Envelopes, Glo-Tone 60lb
2 More Colors >
 
Purple Light Glo-Tone Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$16.87per 250 Pack
A1 Orange Fizz Straight Flap Envelopes, Poptone 70lb
17 More Colors >
 
Orange Fizz Poptone Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$46.49per 250 Pack
A1 Wedding White Cotton Euro Flap Envelopes, Gmund Cotton 74lb
 
Wedding White 100% Cotton Envelopes 3 5/8 x 5 1/8 - Euro Flap - Cotton
$8.22per 25 Pack
A1 Limba Euro Flap Envelopes, Gmund Colors Matt 91lb
 
Limba Gmund Colors MATT Envelopes 3 5/8 x 5 1/8 - Euro Flap - Matte
$6.80per 25 Pack
A1 Steel Grey Straight Flap Envelopes, Dur-O-Tone 70lb
 
Steel Grey Dur-O-Tone Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$35.92per 250 Pack
A1 Butcher Orange Straight Flap Envelopes, Dur-O-Tone 60lb
 
Butcher Orange Dur-O-Tone Envelopes 3 5/8 x 5 1/8 - Straight Flap - Matte
$31.89per 250 Pack
A1 Solar White Linen Straight Flap Envelopes, Classic Linen 80lb
 
Solar White Classic Linen Envelopes 3 5/8 x 5 1/8 - Straight Flap - Linen
$261.52per 2500 Pack
 

A1 Envelopes (FAQs)

Is this envelope suitable for use as a wedding RSVP envelope?

Yes, A1 3 5/8 x 5 1/8 envelope size is a common, standard RSVP envelope size. To match your custom invites, we offer hundreds of A1 response envelopes in colors, finishes, and textures galore, all blank or printed with your return address.

Learn more about LCI Paper's envelope printing service.

A1 envelopes a bit too small for your taste? A2 envelopes are the second most popular response envelope size.

Can little A1 envelopes be mailed in the United States?

Yes, though they are small, A1 envelopes can be mailed through the United States Postal Service.

Do A1 3 5/8 x 5 1/8 envelopes require normal postage?

A1 envelopes require standard postage so long as they weigh 1 ounce or under.

What is the difference between 4-bar and A1 envelopes?

Pertaining to size, nothing! The terms 4-bar and A1 envelopes both refer to envelopes measuring 3 5/8 x 5 1/8 inches - the standard, popular R.S.V.P. envelope size. In technical paper jargon terms, bar comes from baronial - a style of announcement envelope with a traditional pointed flap - but in average joe, envelope size terms, A1 and 4-bar are synonymous.

These envelopes are also commonly referred to as A-1 envelopes, and 3x5 envelopes.

I need wedding reply envelope etiquette help! How do I properly address my envelopes to include both my fiance 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)
  • ...and with your creativity, the list goes on