World’s Smallest Postal Service is run by Lea Redmond in San Francisco since 2008. She has been creating tiny mailable, wedding invitations and announcements for customers all over the globe.
“The WSPS began in 2008 as a quirky little social art project. Postmaster Lea Redmond sets up her tiny roaming office in cafes and shops in the San Francisco Bay Area and beyond and offers a teeny tiny letter transcription service to passers-by. At these appearances the letters are transcribed by hand on a miniature, wooden roll-top desk in the tiniest of script, sealed with a miniscule wax seal with the sender’s initial pressed into it, and packaged up with a magnifying glass.”
You can order your smallest letters at Redmond’s website, Leafcutter Designs.