Thin fly case shaped fly patch suitable for storing thin flies such as nymphs and midges.One side is a flat magnet sheet that easily accommodates lightweight imager patterns such as WD-40 and RS-2.Micro slit foam is available for storing heavy bead heads and patterns.With a thickness of 18 mm (0.7inch), the ultra-thin chest fly patch does not add bulk to the chest area of a fishing shirt. A fly box that can be attached to a fishing shirt or vest. Built-in magnet sheet makes it easy to store used flies. Size: H108 x W74 x D18mm (H4.2 X W2.9 X D0.7 inch) Weight: 41g /1.44oz