Longest line of postcards

Longest line of postcards
Who
Viewspire, LLC
What
23,446 total number
Where
United States (Commerce Township)
When
The longest line of postcards is 23,446 and was achieved by Viewspire, LLC (USA) in Commerce Township, Michigan, USA, on 9 October 2021.
This event took place as part of Viewfest 2021, a psychologist curated community event.