Best value pack :Allowing you to quickly process bulk mail or customize, saving you time and money. | SIDE SEAMED GUMMED FLAP CONSTRUCTION: Invitation envelopes allowing you to send invitations, photos, announcements, RSVPs and greeting cards with confidence and professionalism. | This Forever stamp will always be equal in value to the current First-Class Mail one-ounce price. | PREMIUM STOCK: White wove stock for a high quality feel. Perfect for adding a touch of elegance to social stationary. | ENVELOPES and Forever Flag Stamps IN EACH package: Provides a great value to ensure that you have enough for all your invitation, photo, announcement, RSVP and greeting card needs!