Here are two samples of printed and laminated digital scrapbooking placemats from the forum.
The top one is by Lori and she indicates "I have a wide printer - so this is 13 X 19".... it is for my daughter's (4y) art projects....."
The bottom one I am not sure who created, but it is used for a dog's dish and the layout has a cute and funny story with it.
This is such a great idea! I know it does not cost much at Staples to have them print larger and laminate. I am sure there are other office supply stores that would have the same services.
I can see making customized placemats with your own digital scrapbooking skills and supplies to match the decorations in your house or even customized for a party.