CindyA that is a good question. I mailed mine in a bubble mailer because of the rhinestones on it and hadn't ordered the clear envelopes yet either. I hadn't thought about how the postal stamp would show. I will ask my postal clerk next time I go in, they were very interested in one of the postcards I mailed as a postcard. The clerk didn't want to stamp it and didn't want me to send it that way because she didn't want it to get dirty haha (small town post office). It made it there just fine.