A1 Invitation Envelopes (3 5/8 x 5 1/8) - 24lb. Bright White (50 Qty) | Perfect for RSVP Cards, Invitations, Announcements and Notes | 4865-W-50 Size: A1 Invitation Envelopes 3 5/8 in x 5 1/8 in / 3.625 x 5.125 / 92mm x 117mm Quantity: Pack of 50 Color: 24lb. Bright White USES: RSVP Cards, Invitations, Announcements, Notes, Greeting Cards and Thank you Cards EVENTS: Weddings, Parties, Holiday, Corporate, Banquets, Showers, Birthday Printable on off-set and digital printing presses and some home printers.