The product is a set of 200 1st class postage affixed with security peel & seal #10 size envelopes with a 4⅛" x 9½" dimensions. These envelopes feature a self-adhesive strip for easy sealing and have a security tint liner for added protection. They vary in quantity and are ideal for mailing and shipping needs. The peel-and-seal design adds convenience and security to the envelopes, making them a reliable choice for business use.