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Square Flap Envelopes

Send your next set of invitations in style with Square Flap envelopes. The elegant and distinctive square flap on the back of the envelope goes a step above standard envelopes and lets the recipient know there is something worth noticing inside. Use Square Flap Envelopes for sending invitations, greeting cards, announcements, photos, and other personalized communications. Square Flap Envelopes come in all the standard invitation sizes and a broad array of colors. Add a special touch by choosing Square Flap Envelopes made from textured paper or with a colored foil lining.

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Most Popular Products

#10 - (4 1/8 x 9 1/2)
#10 - (4 1/8 x 9 1/2)
Printed w/
Return Address
A7 - (5 1/4 x 7 1/4)
A7 - (5 1/4 x 7 1/4)
Printed w/
Return Address
#10 - (4 1/8 x 9 1/2) 80lb. White w/Peel & Press™ #10 - (4 1/8 x 9 1/2)
80lb. White w/Peel & Press™
A7 - (5 1/4 x 7 1/4) Grocery Bag A7 - (5 1/4 x 7 1/4)
Grocery Bag
A7 - (5 1/4 x 7 1/4) 24lb. Bright White A7 - (5 1/4 x 7 1/4)
24lb. Bright White
A6 - (4 3/4 x 6 1/2) 70lb. Bright White A6 - (4 3/4 x 6 1/2)
70lb. Bright White
A2 - (4 3/8 x 5 3/4) Taupe Metallic A2 - (4 3/8 x 5 3/4)
Taupe Metallic
30% Off
A9 - (5 3/4 x 8 3/4) 60lb. White w/Peel & Press™ A9 - (5 3/4 x 8 3/4)
60lb. White w/Peel & Press™
A7 - (5 1/4 x 7 1/4) Silver Metallic A7 - (5 1/4 x 7 1/4)
Silver Metallic
A1 - (3 5/8 x 5 1/8) Grocery Bag A1 - (3 5/8 x 5 1/8)
Grocery Bag
A7 - (5 1/4 x 7 1/4) 80lb. White w/Peel & Press™ A7 - (5 1/4 x 7 1/4)
80lb. White w/Peel & Press™
A7 - (5 1/4 x 7 1/4) Gold Sparkle A7 - (5 1/4 x 7 1/4)
Gold Sparkle
A2 - (4 3/8 x 5 3/4) Oak Woodgrain A2 - (4 3/8 x 5 3/4)
Oak Woodgrain
A2 - (4 3/8 x 5 3/4) 24lb. Bright White A2 - (4 3/8 x 5 3/4)
24lb. Bright White
#10 - (4 1/8 x 9 1/2) Grocery Bag #10 - (4 1/8 x 9 1/2)
Grocery Bag
A4 - (4 1/4 x 6 1/4) 24lb. Bright White A4 - (4 1/4 x 6 1/4)
24lb. Bright White
A2 - (4 3/8 x 5 3/4) 24lb. Bright White A2 - (4 3/8 x 5 3/4)
24lb. Bright White

A7 Invitation Envelopes (5 1/4 x 7 1/4)

- 5 1/4 x 7 1/4
See All Colors (142)

A2 Invitation Envelopes (4 3/8 x 5 3/4)

- 4 3/8 x 5 3/4
See All Colors (108)

A4 Invitation Envelopes (4 1/4 x 6 1/4)

- 4 1/4 x 6 1/4
See All Colors (66)

A6 Invitation Envelopes (4 3/4 x 6 1/2)

- 4 3/4 x 6 1/2
See All Colors (108)

A1 Invitation Envelopes (3 5/8 x 5 1/8)

- 3 5/8 x 5 1/8
See All Colors (96)

A9 Invitation Envelopes (5 3/4 x 8 3/4)

- 5 3/4 x 8 3/4
See All Colors (64)

#10 Square Flap Envelopes (4 1/8 x 9 1/2)

- 4 1/8 x 9 1/2
See All Colors (82)

Photo Greeting Invitation Envelopes (4 3/8 x 8 1/4)

- 4 3/8 x 8 1/4
See All Colors (8)

A10 Invitation Envelopes (6 x 9 1/2)

- 6 x 9 1/2
See All Colors (25)

A8 Invitation Envelopes (5 1/2 x 8 1/8)

- 5 1/2 x 8 1/8
See All Colors (38)

Slimline Invitation Envelopes (3 7/8 x 8 7/8)

- 3 7/8 x 8 7/8
See All Colors (14)

Currency Envelopes (2 7/8 x 6 1/2)

- 2 7/8 x 6 1/2
See All Colors (5)

Ticket Envelopes (2 7/8 x 6 1/2)

- 2 7/8 x 6 1/2
See All Colors (1)

4 3/4 x 6 1/2 Booklet Envelopes

- 4 3/4 x 6 1/2
See All Colors (1)

Currency Envelope Window (2 3/4 x 6 5/16)

- 2 3/4 x 6 5/16
See All Colors (1)

A10 Envelope - 24lb. White, Machine Insertable

- 6 x 9 1/2
See All Colors (1)

A8 Envelope - 24lb. White, Machine Insertable

- 5 1/2 x 8 1/8
See All Colors (1)

Currency Outer Envelopes (3 1/16 x 6 3/4)

- 3 1/16 x 6 3/4
See All Colors (1)

A7 1/2 Invitation Envelopes (5 1/2 x 7 1/2)

- 5 1/2 x 7 1/2
See All Colors (2)
Review Rating
A8 Invitation Envelopes (5 1/2 x 8 1/8)
Baby Blue

LOVED these beautiful envelopes. Great quality and quick shipping. Very easy to seal.

Oct 18, 2019

—Caroline

Review Rating
A2 Invitation Envelopes (4 3/8 x 5 3/4)
Baby Blue

Absolutely LOVE these envelopes. They came in quickly and of course super easy to seal. Thanks!

Oct 18, 2019

—Caroline

Review Rating
A6 Invitation Envelopes (4 3/4 x 6 1/2)
Baby Blue

Beautiful color? Great quality, fast service. Will come back again.

Oct 14, 2019

—Monica

Review Rating
A7 Foil Lined Invitation Envelopes (5 1/4 x 7 1/4)
Navy w/Gold LUX Lining

They look awesome. Very happy with the product. Ordered 2,000 and they arrived very quickly.

Oct 11, 2019

—Cat

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
Crystal Clear

I used these envelopes to ship my promo mailers. They have a really nice and somewhat robust feel without being bulky. They look clean and don't scratch too easily.

Oct 2, 2019

—Chris

Review Rating
A2 Invitation Envelopes (4 3/8 x 5 3/4)
Holiday Green

The envelops meet my expectations because I expect Envelopes.com to have excellent products.

Sep 30, 2019

—Lisa

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
80lb. White w/Peel & Press™

These envelopes are PERFECT! They convey the professional look I need to present.

Sep 27, 2019

—Speaking Heart

Review Rating
A6 Invitation Envelopes (4 3/4 x 6 1/2)
Sunflower

The envelopes arrived on time and were exactly what I wanted for the event

Sep 26, 2019

—Marie Martinez

Review Rating
#10 Square Flap Invitation Envelopes (4 1/8 x 9 1/2)
Pool

The color blue matches the color online perfectly. The white printing looked exceptional on the envelope.

Sep 26, 2019

—KS

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
Clear Translucent

Just what I was looking for. Nice quality and works perfectly for fundraising mailers.

Sep 25, 2019

—jane

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Special Offer Details

Free Shipping on Orders of 299 or More
* (1) Merchandise total must equal 299 or more before applicable taxes and ship to one address within the 48 contiguous United States. (2) MUST SELECT "STANDARD SHIPPING" as your shipping method BEFORE entering the code. (3) Enter the coupon code FREE299. Offer not valid for Alaska, Hawaii, United States Territories or International destinations. Offer is not redeemable on previous orders and cannot be combined with promotional coupon codes. Offer CAN be used in conjunction with Loyalty, Trade Pro and Non-Profit Discount Program. Offer not valid on phone orders. Terms of offer are subject to change at any time.
$5 OFF Orders Over $50
*Merchandise total must equal $50.00 or more before applicable taxes. To be eligible, customers must enter the coupon code TAKEFIVE at checkout. Offer is not redeemable on previous orders and cannot be combined with promotional coupon codes. Offer CANNOT be used in conjunction with Loyalty, Trade Pro and Non-Profit Discount Program. Offer not valid on phone orders. Terms of offer are subject to change at any time.

Free Shipping Promotion

To get the discount:
* (1) Merchandise total must equal $299 or more before applicable taxes and ship to one address within the 48 contiguous United States. (2) MUST SELECT "STANDARD SHIPPING" as your shipping method BEFORE entering the code. (3) Enter the coupon code FREE299. Offer not valid for Alaska, Hawaii, United States Territories or International destinations. Offer is not redeemable on previous orders and cannot be combined with promotional coupon codes. Offer CAN be used in conjunction with Loyalty, Trade Pro and Non-Profit Discount Program. Offer not valid on phone orders. Terms of offer are subject to change at any time.
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Free Shipping Promotion

To get the discount:
* (1) Merchandise total must equal $299 or more before applicable taxes and ship to one address within the 48 contiguous United States. (2) MUST SELECT "STANDARD SHIPPING" as your shipping method BEFORE entering the code. (3) Enter the coupon code FREE299. Offer not valid for Alaska, Hawaii, United States Territories or International destinations. Offer is not redeemable on previous orders and cannot be combined with promotional coupon codes. Offer CAN be used in conjunction with Loyalty, Trade Pro and Non-Profit Discount Program. Offer not valid on phone orders. Terms of offer are subject to change at any time.
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Black Friday

To get the discount:
This offer must be redeemed and orders placed by November 29, 2019. To be eligible, customers must enter the coupon code BF2019 at checkout. This offer CAN NOT be used in conjunction with FREE299, Trade Pro or Non-Profit Discount Program. Offer is NOT redeemable on previous orders and CAN NOT be applied to Sale/Clearance Items. This offer CAN NOT be combined with other promotional coupon codes. Terms of offer are subject to change at any time.

Cyber Monday

To get the discount:
This offer must be redeemed and orders placed on Dec. 2, 2019. To be eligible, customers must enter the coupon code CYBER2019 at checkout. This offer CAN NOT be used in conjunction with FREE299, Trade Pro or Non-Profit Discount Program. Offer is NOT redeemable on previous orders and CAN NOT be applied to Sale/Clearance Items. This offer CAN NOT be combined with other promotional coupon codes. Terms of offer are subject to change at any time.

Cyber Week Extended

To get the discount:
This offer must be redeemed and orders placed by Dec. 6, 2019 (11:59 PM EST). To be eligible, customers must enter the coupon code CYBERX19 at checkout. This offer CAN NOT be used in conjunction with FREE299, Trade Pro or Non-Profit Discount Program. Offer is NOT redeemable on previous orders and CAN NOT be applied to Sale/Clearance Items. This offer CAN NOT be combined with other promotional coupon codes. Terms of offer are subject to change at any time.

Green Monday

To get the discount:
This offer must be redeemed and orders placed by Dec. 9, 2019 (11:59 PM EST). To be eligible, customers must enter the coupon code GREEN19 at checkout. This offer CAN NOT be used in conjunction with FREE299, Trade Pro or Non-Profit Discount Program. Offer is NOT redeemable on previous orders and CAN NOT be applied to Sale/Clearance Items. This offer CAN NOT be combined with other promotional coupon codes. Terms of offer are subject to change at any time.

Cyber Week Returns

To get the discount:
This offer must be redeemed and orders placed by Dec. 17, 2019 (11:59 PM EST). To be eligible, customers must enter the coupon code CMR2019 at checkout. This offer CAN NOT be used in conjunction with FREE299, Trade Pro or Non-Profit Discount Program. Offer is NOT redeemable on previous orders and CAN NOT be applied to Sale/Clearance Items. This offer CAN NOT be combined with other promotional coupon codes. Terms of offer are subject to change at any time.

Year End Clearance

To get the discount:
This offer must be redeemed and orders placed by Dec. 31, 2019 (11:59 PM EST). To be eligible, customers must enter the coupon code BYE2019 at checkout. This offer CAN NOT be used in conjunction with FREE299, Trade Pro or Non-Profit Discount Program. Offer is NOT redeemable on previous orders and CAN NOT be applied to Sale/Clearance items or Holiday Clearance items. This offer CAN NOT be combined with other promotional coupon codes. Terms of offer are subject to change at any time. All Holiday Clearance prices are as marked - no code required.

Holiday Deadlines Schedule

Order Type Date of Order Approved (By 3PM EST) Production Method Shipping Method
Custom Printed Orders
December 9th Standard Standard
December 11th Rush Standard
December 17th Rush Premium
Plain Orders December 20th Rush Next Day

Add Addresses Later:

Limited Time! 15% Off Recipient Addressing.
Not ready to upload your address list? Order now and upload your list later! Use code EARLYBIRD15 at checkout. You will receive an email confirmation with instructions on how you can upload your list at any time. You can also access your order at any time from your account page.
* Offer valid October 24, 2017 through November 3, 2017 and cannot be combined with any other offer.
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Special Promotion

Merchandise total must equal $250 or more before applicable taxes and order must be placed between 10/28/19 and 10/29/19. Offer is not redeemable on previous orders and cannot be combined with promotional coupon codes. Offer CANNOT be used in conjunction with Loyalty, Trade Pro and Non-Profit Discount Program. Offer not valid on phone orders. Terms of offer are subject to change at any time.

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