RIO - C&F Designs Waterproof 16 Row Flip Page Fly Box A large box for even more capacity for flies #10 - #18 Eight rows of MSF in the lid and base and a one-sided 7-row flip give a total capacity of 537 flies 100% waterproof SIZE: 7.75" x 4.48" x 1.65" (19.7 x 11.4cm x 4.2cm) COLOR: Dark Grey