http://www.danielsmith.com/Item--i-G-165-240-BB
I have bought a lot of these. I especially like the bamboo frames. all of the frames in this line come with glass and a precut mat. I usually don't use the mat and often the glass has a tiny scratch in it somewhere that never causes me a problem.
The rubber tree black frames have a nice look to them if a bit thin and you can't beat the price. It doesn't take much to buy enough that they give you free shipping.