There is, however, add-on support. You can install a Google Docs envelope add-on to access a list of page sizes that transform the document in seconds. All you need to do is edit it with names and addresses, and you’ll be ready to print your own envelopes.
Install an Envelope Template Add-on
Printing envelopes primarily involves choosing the right page size. Google has a handful of preset sizes in the Page setup setting, but we’ll use an add-on to make it even easier.
Add Addresses to the Envelope
Now that the envelope-sized page has been created, you can edit it to include addresses and names. Make the font any color and size you want just as if you were editing a normal document. Select it when you see it and then choose Install followed by Continue (you might also need to give it permission to access your Google account). This is what we’ll use for the rest of this article. You’ll most likely need to double-click in the header section to write the return address. The Tab key is your friend here, so you use it when you need to for alignment purposes. If you need the return address to sit closer to the left margin, feel free to change the margin size via File > Page setup. Set the left margin to 0 so that you can fine-tune exactly where the address should sit.
Make a Google Docs Envelope Template
With the page configured exactly as you need it for the envelope, with addresses positioned correctly, you now have yourself an envelope template. You can edit over it when you need to print other envelopes, or turn it into a template by copying it as many times as you need to. Go to File > Make a copy to duplicate it and preserve the original. Name it something different and edit it with a different address to make another envelope.
