Amazon.com : Premium Black Envelopes for 4x6 (A6 Size - 4 3/4" x 6 1/2") - Heavyweight (70lb) Envelopes for Invitations & Greeting Cards - 40 Pack : Office Products
Amazon.com : 4" x 6" Envelopes for Invitations - Bright White A6 Envelopes (4 3/4" x 6 1/2") - Square Booklet Flap (100 Envelopes) : Office Products
55 5x7 White Invitation Envelopes - for 5x7 Cards - A7 - (5 ¼ x 7 ¼ inches) - Perfect for Weddings, Graduations, Baby Showers - 120 GSM - 32lb/80lb Text - Peel, Press & Self Seal - Square Flap
Amazon.com : White Florist Size/Gift Card Envelopes (2 3/8" x 3 5/8") - 100 Envelopes : Business Envelopes : Office Products
Amazon Basics #6 3/4 Security Tinted Envelopes with Peel & Seal, 100-Pack, White
Amazon.com : 55 3 ⅝ x 5 ⅛ White RSVP Small Envelopes - A1 - For Weddings Response Cards, Baby Showers, Thank You Notes, Photos and any 3” x 5” inserts -
Amazon.com : #6 3/4 Window Envelope - 24# White (3 5/8 x 6 1/2) - Window Envelope Series (Box of 500) : Check Envelopes : Office Products
JAM PAPER A7 Invitation Envelopes - 5 1/4 x 7 1/4 - White - 50/Pack