Here's a description of the wallet from Ralph's site:
"Always have your sketchbook with you! This high quality, American made wallet removes the excuses. Carry your cash, credit cards AND your sketchbook in this beautiful black leather wallet. The wallet measures 4x6 inches and comes with a replaceable, standard sized, 3.5 x 5.5 inch sketchbook. Perfect for sketching on the go!"
You can order refill notebooks from Ralph or use the Field Notes books instead.
Here's a photo of the Sketch Wallet when it is closed. Ralph also sent along a large sticker of his logo. I like the clean eye-catching look of his inkwell logo.
I see many hours of sketching in my future.