50 Deluxe Envelopes + 50 Sealing Stickers. The envelopes feature a moisture-activated adhesive strip on the flap, allowing for easy sealing with just a touch of water. These contoured envelopes serve perfectly as invitation envelopes and are also ideal for mailing purposes. They are specifically designed to accommodate 4x6-inch cards, announcements, invitations, and engagement cards. The included A4-sized envelopes make excellent response envelopes, fitting easily inside A6, A7, A8, A9, and A10 size envelopes. Weight: 0.57 lbs.