You can acquire a licence to use Cocopix drawings commercially whether you are a publisher, a business or an individual by contacting me: Contact.
All motives for poscards will be delivered on CD-ROM as digital images in TIFF format (CYMK) with a resolution of 1358x1866 pixels at 300 PPI (115x158mm). A 5 mm border is taken into account for cutting purposes.
Royalty free images will also be exclusively available at iStockphoto.com which you can access by using the banner below:
Image examples on Cocopix.com: Gallery
Real-life example for postcards: