Service and Turnaround Interstate Envelope has, over the years, gained a reputation for unsurpassed commitment to service and quality. Our standard workweek consists of 24 hours per day, five days per week, with additional hours as needed. We maintain over 1,000 envelope and windows dies of all shape and sizes in stock, as well as a wide variety of paper stock and sizes in order to provide our customers with the best possible service. We can begin producing your order within hours of receipt of a purchase order. Interstate is proud our ability to provide our customers with the quick turnaround required to compete in today's competitive market. Please contact our customer service department regarding your envelope requirements.