If paper and postage is how your business gets done, we can provide the gear you need. Choose from stationery products, including envelopes, letterhead, customized reply and confirmation return cards, invoices and statements, and claim forms for the insurance and medical industry. Streamline your payroll or claim payment process with this customized envelope. This 8 5/8" x 3 5/8" mailer is made of durable 24 lb. stock with windows for mailing and return addresses, and a gummed flap and inner lining that protects your privacy and confidentiality.