Traditional media from my archives...
These are small acrylic paintings done on cold-press illustration board. The size was a function of time - working at a small scale made it possible to work very quickly. I would typically produce 3-4 of these a day.
These images were done entirely for my own enjoyment, although the technique is similar to the way concept art was done prior to the widespread use of Photoshop and other digital tools. I still find drawing and painting with traditional media to be much more direct, though I seldom do this kind of artwork these days.
The dimensions of each piece are 5" x 7.5" inches, and they were painted with Liquitex acrylics.
They appear at 2X their actual size on my monitor (if you download the full size image)