http://www.disboards.com/showthread.php?t=1755694&highlight=mousekeeping+envelopes&page=2
look in this thread or ask in this thread for a thank you envelope. They are typically "money envelopes" for kids but they might work.
Otherwise, check out these envelopes and see if they might work:
http://www.4shared.com/dir/5978989/a06aa930/Natalies_DISigns.html
look in her mailing envelopes file and you will find some that might work. There is a blank white square and again you can use a textbox in word for these. Here is how you do it (in case you haven't done it before):
Text Box
Make sure that your cursor is below the image that you want to insert a text box over.
Then look for the tab at the top of word that says "insert".
Scroll down and click on "text box".
A big box will show up on the screen that says text box...ignore this box but look for your mouse that will show up as an +. Move the +/mouse to where you want your text box to go then right click and drag the mouse to make the size box you want for the area you want the wording to go.
Then go back up to the top of word and click on "format".
Then click on "text box".
Look for the tab that says "colors and lines".
In the fill section make sure the color box says "no color"
In the line section make sure the color says "no line".
Then the background will show through behind whatever text you type in the box and there won't be a line around the text box.
Then you can type whatever you want inside the box by clicking inside the box and choosing font and size.
If the box isn't the right size you can drag the corners and sides to make it the right size.
This is great to use when you find a DISign that you like and want to add a name to it. For example, Natalie's great Mickey Heads...she has a lot of blank ones in her shared file that you can add names to.
