Amazon.com : A6 White Envelopes 4X6 100 Pack - Quick Self Seal ,For 4x6 Cards| Perfect for Weddings, Invitations, Photos, Graduation, Baby Shower| 6.5 x 4.75 Inches (A6) : Office Products
4" x 6" Envelopes for Invitations - Bright White A6 Envelopes (4 3/4" x 6 1/2") - Square Booklet Flap (100 Envelopes) : Office Products - Amazon.com
Amazon.com : EOOUT 24 pcs Poly Zip Envelope, Reusable Envelopes, Pencil Case Bulk, Bill Bag, 9 x 4.7 Inches, A6 Size, 10 Colors, for School and Office Supplies : Office Products
Amazon.com : A6 Blank Invitation and Card Envelopes, Square Flap Gummed, White, Pack of 50, Thick 70# Paper, (6-1/2 x 4-3/4 inches) : Office Products