A4 Invitation Envelopes (4 1/4 x 6 1/4) - 24lb. Bright White (50 Qty.) | Perfect for Invitations, Announcements, Sending Cards, 4x6 Photos | Printable | 4872-W-50 Size: A4 Invitation Envelopes 4  in x 6  in / 4.25 x 6.25 / 107.95mm x 158.75mm Quantity: Pack of 50 Color: 24lb. Bright White 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 and digital printing presses and some home printers.