They also have an awesome on-line pricing tool so you can figure out what your mailing will cost. These are very inexpensive fulfillment pieces and they look pretty sharp. All you need to do is design a small webpage with your message and graphics and they will print it onto a postcard. We have printed up about 5,000 of these in the last year to advertise our own services. These are free services that will retain the viewing quality of your graphics but compress them down as much as possible so that they load faster.
Greater resolutions provide no benefit on the Internet.