I wish that they were self-adhesive but that would be a whole different price. I use these for all the greeting cards I make and send out. There are better envelopes but probably not at the price I paid. Really you can't go wrong with these. They are fine for most purposes so stock up.
The envelopes are a perfect size for the cards I make for family members the grandkids love getting homemade cards from me! I’ve been making them for years. I have a Hallmark Card app.