A Guide to Fly Fishing Vests:Size of Pockets
The next thing that needs to be taken into account on the fly fishing vest is not only the number of pockets, but the size of them, too. Having a bunch of pockets does little good if the pockets are too small to hold essential items. Conversely, having a dazzling array of little pockets creates endless frustration while attempting to find something but memory has failed on where it was last put.
Personally, I'm not a fan of fly fishing vests that have a ton of little pockets on them. I've found that 6-8 relatively small pockets is just enough to hold the little things while out on the stream, including things like your wallet and car keys. For the medium sized to larger pockets, I've found 4-6 of them is generally enough to hold all the fly boxes, leaders and other things needed, at least if the car is within easy walking distance. Obviously, if you'll be miles away from your vehicle and will be facing uncertain fishing conditions, a more spacious fishing vest may be needed.