Despite the name, linen postcards were not produced on a linen fabric, but used newer printing processes that used an inexpensive card stock with a high rag content, and were then finished with a pattern which resembled linen.
The face of the cards is distinguished by a textured cloth appearance which makes them easily recognizable.
Postcards were not allowed to have a divided back and correspondents could only write on the front of the postcard.
The card design featured a large letter spelling of a state or place with smaller photos inside the letters.
The design can still be found in many places today.
Due to the inexpensive production and bright realistic images they became popular.
One of the better known linen era postcard manufacturers was Curt Teich and Company, who first produced the immensely popular "large letter linen" postcards (among many others).