Hi, sometimes you come across laminated 1 page sheets with wild edibles. I couldn't find something small enough so I borrowed some info from This site which I put into a coil bound book. It's about 1 cm thick and 8.5 x 5.5. Not pocket sized, but it fits in the top of my backpack.

I would love to hear if you come across something better! Or maybe we should put one together!
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Without a doubt, the hardest thing of all in a survival situation is to cook without the benefit of seasonings and flavourings. - Ray Mears

http://theoutdooradventure.net