Side loading Stayflats® Lite Mailers and Express Pouch open at the wider side and make fulfillment a breeze. • Attractive white mailer makes a great impression. • Peel and seal closure keeps contents secure during shipment. • Mailers feature a pull tab strip for easy opening. • Made from 100% Recycled paperboard (.018 CCNB paperboard)*Except Express Pouch • Weighs 1 to 2 ounces less than comparable rigid bag mailers • The First Dimension for each mailer listed below is the size of the opening.