I have always been a stamp collector, but not a fanatic one.
Recently, I have found a way to mix both my philatelic hobby and penpal-ing hobby - that is, collecting covers.
I am looking for a square envelope with at least 3 stamps on it.
Envelopes could be white, yellow, green, whatever you wish, but please use real stamps.
I will be happy to get a request from sincere people who do not cheat. Let's play fair.