
According to the Koyono website, Slimmy is the slimmest front pocket wallet on Earth. How they know this is up for debate I guess, but judging from the photos available on the website, I’d say that this wallet is pretty thin.
What makes Slimmy the ultimate slim wallet is the unstitched side that eliminates the need for folds, providing the easiest way to store and access items. This patented design conforms firmly to the contour of your currency, credit cards, driver’s license, business cards and receipts for maximum slimness. It will conform more tightly with use.

I’m definitely one of those people with an ever-increasing wallet size (mostly due to my stupid habit of keeping receipts in there for longer than I should). I just can’t seem to get my wallet down to a controlled size most of the time. But that’s not really the problem. I think my problem, now that I’ve seen Slimmy, is that the core material that my wallet is made of is just too thick!
I’m in the market for a new wallet so seeing Slimmy is really making me want it. And at $29.95, it’s a fairly decent deal.
A nice wallet. Slimness is my thing, and that is why I ordered a Mighty Wallet instead a leather one. But the problem was that it was STILL too big. If you get into bar in the evening, you feel like having more contron on your wallet when it is your front pocket, and then even the Mighty Wallet is too big.
I made mine from a A4 tyvek sheet, cutting 5 cm off from the short side and then using Mighty Wallet cutting. You must 3-fold the banknotes, but that is the prive you must pay. Now THAT is perfect! :)