MFC's New Poly Boxes are made from a very special plastic that allows them to "tattoo" artist's images into the box for a vibrant finish that lasts forever. This new design has quickly become a favorite among anglers due to it's adjusted sizing. It's now longer and deeper to fit more flies. A 544 total fly capacity if you add the optional leaf insert. Measuring: 5.5" long, 3.5" wide, 1 3/8" deep.