This blog post focuses mostly on getting envelopes through the United States Postal Service. If you do not live in the United States, I apologize in advance for not being able to speak knowledgeably about the postal regulations in your country! However, whether you are US-based or not, I can guarantee that you will find some really neat mail art inspiration in this post … and every single envelope pictured has been successfully delivered via USPS. It’s time to pull out your envelopes (or DIY some!) and get creative!