Here's what we've done with Mod Podge:
take a clear glass plate, flip it upside down and cover with a layer of Mod Podge. Lay fabric over the upside down plate and smooth over all edges. Layer Mod Podge on top of fabric. Let dry and then trim fabric to just inside the edge of the plate. Put a couple more layers on the fabric and let dry.
When dry the fabric is sealed well enough to wash. We made them to give away with cookies and candies at the holidays. You could make them for any holiday. We just used plain cotton. Once I get a pic, I'll add it so you can see. My friend has used hers for a year and had nothing but good to say about it!