VARIOUS SIZES - We offer a wide variety of envelope sizes, from DL to C4, to suit your document and letter shipping and storage needs QUALITY PAPER - Our envelopes are made from 90gsm thick paper, giving them durability and an elegant appearance that will impress your recipients SELF-ADHESIVE CLOSURE - SELF ADHESIVE CLOSURE - Forget about the hassle with adhesive tape. Our envelopes feature a convenient self seal that makes sealing quick and secure easy WINDOW OPTIONS - If you want a convenient way to display the address in your shipments, we offer models with windows on the left or right, giving you flexibility in presentation DIFFERENT QUANTITIES - Whether you need just a few envelopes or a larger quantity, we offer 10 count purchase options or packs of 500, allowing you to save money on large orders or stock up for the future!