Advice on matting and backing board?

Hey all,
I'm going to enter some of my work in a competition soon and had a few quick questions. They don't want the work framed, but they want it matted with backing board.
- I was just curious as to where you all would suggest buying online and what size backing board you would use?
I'm looking to keep the costs down and it doesn't have to be museum quality products by any means.


Thanks a bunch for the insight.

Try golden state art...

If you do a web search for "picture matte online", you will find a number of suppliers.

WesternGuy

Thanks you two.
I've been looking and have found a few that are looking promising.
I just thought I would post up here to see if there are any go to places for price to quality ratio.