Yellowstone Angler Fly Boxes
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YA 6 compartment folding box
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Easy-Selection-Box
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This is a great pocket box for flies.  We use these to hold our splitshot and indicators.
Easy Selection Folding Box, 6 Comp., Individual Lids 3 1/2" x 2 1/2" x 1 1/4".

YA 201 Fly Box
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This is one of our favorite boxes of all time! 20 individual compartments with lids.  It is perfect for a wide variety of flies.  We use ours to hold hackled dry flies.  It would make the perfect mayfly or caddisfly box!
20 compartments with flip top lids, 6 1/2" x 3 3/4" x 1 5/8".