They make nice studies and if I really enjoyed doing them, I can do a larger one in Acrylic or watercolor. I find them to be very helpful and they sell quickly. They aren't so costly to produce and you don't have much time invested in them.
The two at the top are 6" x 9" and the other one is 4"x 4"
I've been sick so I haven't been to the studio since Friday. I plan to return tomorrow and hope I feel like doing something.