Envelopes are one of the oldest means of disseminating and keeping important documents safe. Despite the ever increasing use of computer technology and internet in the electronic communication, the old method of letter keeping is still in use today. Envelopes are still a key tool in connecting with customers. Envelopes are still being use to keep influential and classified documents of any office or household. They come in many different sizes you can choose from a wide variety or you can just personalize your own envelope.