RSVP postcard envelope etiquette

How tiny is tiny? It needs to be at least 3.5 x 5 and no more than 4.25 x 6 in order to go at the postcard rate. Smaller or larger postcards will have a surcharge.

I think if you put the postcard with the stamped side up, people will notice it and mail it back to you.

If you put it in an envelope and they mail it back to you in that envelope -- it defeats the purpose of putting a postcard rate stamp on the p/c.

I think its okay to have it floating alone, that was my plan. Putting the postcard in an envelope defeats the purpose. I'll probably stack them so that when you open the envelope, guests will see invite first, and the behind that will be the reply postcard and insert card.

It's large enough to qualify as a postcard. That's a good idea to have the stamp side facing upward so that it doesn't get overlooked.

You need to make sure you meet all the requirements for a postcard. You don't want them all to get sent back. On top of being large enough, they also need to be thick enough. I'm not sure how you determine that.

http://pe.usps.com/businessmail101/mailcharacteristics/cards.htm

There are also limits on where text can go. You should check out this site too.

http://www.overnightprints.com/usps