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

- 4 3/8 x 5 3/4
See All Colors (110)

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

- 4 1/4 x 6 1/4
See All Colors (67)

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

- 4 3/4 x 6 1/2
See All Colors (109)

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

- 3 5/8 x 5 1/8
See All Colors (85)

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

- 5 3/4 x 8 3/4
See All Colors (65)

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

- 4 1/8 x 9 1/2
See All Colors (83)

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 (26)

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

- 5 1/2 x 8 1/8
See All Colors (39)

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

- 3 7/8 x 8 7/8
See All Colors (15)

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

These were perfect for my son to do his own thank you's after his Bar Mitzvah and it is much easier when no one needs to lick the envelopes. Good quality.

Sep 11, 2019

—Bar Mitzvah mom

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
Silver Metallic

Great quality. Printed addressing turned out great on this material. We are very satisfied with this product.

Sep 10, 2019

—Julie

Review Rating
A2 Invitation Envelopes (4 3/8 x 5 3/4)
White - 100% Recycled

Excellent quality, and I like the fact that they're recycled. Your shipping was so fast that it was amazing.

Sep 9, 2019

—Hazel Blumberg-McKee

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
Silver Metallic

These arrived quickly and were exactly what I was looking for!

Sep 4, 2019

—Erica

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
Misty Rose Metallic - Sirio Pearl®

This was the perfect color and look for our wedding! The envelopes fully encompassed the look of our invitations.

Sep 4, 2019

—Allison

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

Excellent quality. Easily printable on my straight through laser printer

Sep 3, 2019

—Judy

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

Excellent product selection. Reasonable pricing. Custom quantities. Good response. Decent delivery. Workable website.

Sep 2, 2019

—Claudia

Review Rating
A7 Invitation Envelopes (5 1/4 x 7 1/4)
Gold Sparkle

These envelopes are gorgeous!!! When I got my invitations I felt like they needed some sparkle. The glitter envelopes were the perfect touch. I received several compliments on them. We printed the labels directly onto the envelopes

Aug 30, 2019

—Kenley Oliva

Review Rating
A4 Invitation Envelopes (4 1/4 x 6 1/4)
Grocery Bag

These are sturdy, good quality size A4 envelopes which I could only find on the envelopes.com site. They are perfect for the odd size cards I got in Denmark. I would definitely purchase again.

Aug 30, 2019

—Wanderer

Review Rating
A2 Invitation Envelopes (4 3/8 x 5 3/4)
Strathmore Premium Wove® 80lb. Natural White

Size as expected, very thick, perfect for whatever wedding stationary you needed. (I'm using the bright white color for save the dates). Shipped fast and arrived undamaged. Using DIY save the dates & thank you notes and these envelopes have saved me at least 50% cost. Probably more because I feel like my DIY stuff is nicer than the cheaper versions of wedding stationary that I priced out.

Aug 29, 2019

—Erin

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* (1) Merchandise total must equal $250 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 FREE250. 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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Sleigh

Holiday Deadlines Schedule

Order Type Date of Order Approved (By 3PM EST) Production Method Shipping Method
Custom Printed Orders
December 10th Rush Standard
December 12th Rush Premium
December 17th Rush Next Day Air
Plain Orders December 21st Standard Standard

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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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