A4 Invitation Envelopes w/Peel & Press (4 1/4 x 6 1/4) - Navy Blue (50 Qty.) Size: A4 Invitation Envelopes / 4 1/4 in x 6 1/4 in / 4.25" x 6.25" / 107.95mm x 158.95mm Quantity: Pack of 50 Color: Navy USES: Invitations, Announcements, Holiday Cards, Greeting Cards, 4 x 6 Cards, 4 x 6 Photos, Letters, Personal Mail, Direct Mail. EVENTS: Weddings, Parties, Holiday, Corporate, Banquets, Showers, Birthday Printable on off-set printing presses and some home printers.