Customize your fly box with precision-fit tapered dividers that fit in slots on the sides of the box. Neoprene gasket in the cover helps keep your flies dry when wading. The Medium and Large Adjustable Fly Boxes can be adjusted from 3 compartments to 15. The small box can be adjusted from 3 to 9 compartments. Small Box: Shallow depth makes it easy to remove small flies. Measures 4 1/4" x 3 3/8" x 3/4". Medium Box: Our best-selling size. Measures 7 1/16" x 3 5/8" x 1 3/16". Large Box: A great box for everything, from saltwater to dry flies. Measures 7 1/2" x 4 1/2" x 1 1/4". Vendor: Orvis