> Unconventional postcards: A thin sheet of plywood Can confirm, I laser cut wedding invitations out of 1/4" plywood and mailed them out like that. I think it

> Unconventional postcards: A thin sheet of plywood Can confirm, I laser cut wedding invitations out of 1/4" plywood and mailed them out like that. I think it required some "non-machineable" stamp or similar, but they all arrived at their intended destinations.