This top row has two sketchs that became very popular prints (also shown). I did lots of Merlin paintings and sold most of them.
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I drew mostly on 20'x30" boards and my sketchbook. My paintings were of all sizes. I liked 48"x48" for the ones that I thought were important. I did a lot of 24"x48" later for the drama of the odd size. Small ones are in the 24" range. I like to work big, but the smaller ones are easier to sell.