Hello everybody! I added some photos here of interest to me, and maybe you as well. I have learned this pretty way of addressing envelopes to mail, from an Instagrammer, called Devoted Diarist. She has a different sort of lettering on hers, but really, you can use your own normal handwriting, just making it larger, and colorful, and adding more element on the envelope. I use pretty stamps, and a star rubber stamp and added stars all over for an Independence Day feel.
This one is mine: