These super small one sided fly boxes feature new and improved waterproof construction with a detachable neck strap. The strong, clarified ABS plastic makes it easy to see your flies. This box features watertight gaskets and stainless steel hinge pins that last much longer than traditional plastic hinges. Can be worn around the neck or easily fits in your pocket. Detaching neck strap with easy remove clip. Holds up to 54 flies. Measurement: 3" x 4-1/4" x 1" Weighs 2.5 ounces.