Walnut Field Note Wallet
Made to hold most 3.5" x 5.5" notebooks including Field Notes, Moleskine, and many others.
Slip the back cover in the pocket on the right side, and store receipts, notes, etc. in the flap on the left. You can use the card pocket for business cards, or credit cards and folded cash.
Closed dimensions: 4" x 6.25"