The Sketchbook Wallet is a great way to consolidate your everyday wallet, a sketchbook, and a pen holder.  This wallet is a great way to improve your drawing skills by giving you a way to carry your sketchbook with you everyday.

This design has room for any standard pen along the spine or a special sleeve between the card holders for any pen shorter than 3.5 inches.  Pens like the Fisher-Space Pen, The Zebra F-301 or the Kaweco Liliput fit perfect between the cards.