This is a set of TWELVE empty used mail envelopes. These range from the 1909-1930's. Most have legible postal dates. All are addressed to the W.D.N. Printing Co. in Mahtowa, Minnesota. They were sent from MN, Wisconsin & Michigan. Sizes vary, but most are 3 1/2" x 6". The colors are ivory & tan. Some show smudges, wrinkles, marks. Some edges are tattered. Some are opened on the side, others on the flap. There is writing on the back of a few. The stamps are red, purple & green. They are one, two & three cent stamps! One stamp is on upside down! Twine not included. No written letters included, just EMPTY envelopes.