S=100 Count (Pack of 1),M=100 Count (Pack of 2).Each A2 envelope is specifically designed to perfectly accommodate a standard 8-1/2"" x 11"" sheet of paper folded into quarters, making it the ideal choice for all your social correspondence needs. Featuring a moisture-activated gummed seal, these invitation envelopes allow you to send out invitations, photos, announcements, Rsvp cards, and greeting cards with confidence and professionalism. This product offers exceptional value, ensuring you have a generous supply of envelopes on hand to effortlessly handle all your mailing requirements-from invitations and photos to announcements, Rsvp cards, and greeting cards! Weight: 0.86 lbs.