Lots of options, easy to create, easy to peel. Great product.

While I am using these on the front of the envelope, due to their size, they are likely intended to be used on the back. Being a bit oversized, they add a sense of fun to the front of our graduation announcement envelopes, but would be too big for the front of a thank you note envelope. The labels come off the sticker backing easily and attach firmly to the envelope.