What's your big game? Just because it's called a Permit fly box doesn't mean you can only store Permit flies in it. As you might note from the picture above, steelhead spey flies also fit this box very well. The Waterproof Tarpon Fly Box will help you organize any flies that are 3" to 4". The Waterproof Bonefish Box is meant to carry flies in the 1" to 1 1/2" lengths.
7.75" x 4.48" x 1.65" (19.7cm x 11.4cm x 4.2cm)