Pocket Size Field Books Just like the regular Field Book, but small enough to fit in your pocket at 3" x 4". These colorful books feature corrugated covers, brass binding and an oval window that reveals the wonderful Hemp Heritage paper inside. All Field Books can be personalized by removing the printed flysheet and placing your own image under the oval window. What a wonderful idea for a personalized gift place a picture of the precious little baby in the oval window and give with love. Many memories can be kept forever! Made by Green Field Paper Company, USA.