So, I bought a frame on sale at the craft store for my Little Blue Birds painting. My original intent was to give it away as a gift to a friend, but I'm not good at parting with my paintings, so that didn't happen. I still put the painting in the frame and ended up hanging it in my painting room:
I painted it with a small, white border that I masked out with masking tape. I thought that it would kind of serve as a mat, but that didn't work out. The border was too thin and the lip on the frame was the exact same width as the white border. Would this painting look 100 times better with a mat? Absolutely! Do I care? Not really. I think it looks just fine without a mat.