These envelopes are made out of smooth, high quality paper. In this pack, each envelope has a straight flap with a reliable gum closure. These envelopes feature a versatile, spotless white color that makes them perfect for both personal and professional mailing uses. Knock some items off your list by sending our invoices, documents, itineraries, receipts, tickets, Save the Date cards, Christmas greetings with your family photo, and more with these long envelopes!Details:Available in multiple countsWhite5.875" x 12" (#16) size28 lb. (105 gsm)50 envelopesPaper