Postcards are available in a variety of sizes from a
standard 4"x6", and jumbo 5.5"x 8.5" being the most
common. However, different sizes such as panoramic's and mega cards are
available. You simply tell me what size you need and I will create a
custom card set up to your specs.
See my samples below. I suggest sites such as QuantumPrint.com and OvernightPrints.com to
to check sizes and pricing. I personally use Overnight Prints for my
fine art jobs.
Google cheap postcards and see what you find.