Postcards can be made out of just about any thick paper[paper?:paper sample maker cutting machine]. It's an economical and creative way to send a greeting. In order to send a postcard using the inexpensive postcard rate within the United States, the postcards must be under certain sizes.
If a postcard falls outside of these specifications they can still be sent but may require a first class letter stamp in place of a postcard stamp. Postcards sent internationally are subject to the regulations of the country to which they are being sent. These postcards, whether for personal or professional use, can be made using simple, readily available materials.
