1. On the Tools menu, point to Letters and Mailings, and then click Envelopes and Labels.
2. Click the Envelopes tab.
3. If necessary, enter or edit the delivery and return addresses.
4. Click Options, and then click the Envelope Options tab.
5. Under the item you want to adjust, click Font.
6. On the Font tab, select the options you want.
7. To use the new address formats for all envelopes you create that are based on the current template (template: A file or files that contain the structure and tools for shaping such elements as the style and page layout of finished files. For example, Word templates can shape a single document, and FrontPage templates can shape an entire Web site.), click Default, and then click Yes.

Note  If you want to format individual words in an address rather than an entire address element, first make sure you attach the envelope to a document instead of printing it right away. Then, select text on the attached envelope and format it as usual.

1. On the Tools menu, point to Letters and Mailings, and then click Envelopes and Labels.
2. Click the Envelopes tab.
3. Click Options, and then click the Envelope Options tab.
4. In the Envelope size box, click the size you want.

   If the size you want is not listed, click Custom size, and then enter the dimensions of your envelope.

You can add WordArt (WordArt: Text objects you create with ready-made effects to which you can apply additional formatting options.) or graphics to envelopes as you would to any document. Just be sure to place them where they won't obstruct the address or otherwise interfere with the mail processing. For more information, check with the postal service.