The frames I use are made by a local family owned business, Victor Gallery. They are made of solid wood, either naturally unfinished or painted in white. I like their frames because they are really simple, classic and good quality.
I can order any size I need. The frames come with glass, I cut the mat backing and mount my work in the frame ready to hang. I have always done this as a way of making my work more affordable but also because I prefer to choose how each piece is presented within the frame.