I carried this one for years...the secret to its convenience is that it's half the size of most coin cases and made of soft thin leather. It just disappears in your pocket. You can't carry much, but I don't wnt to anyway.
And it's falling apart, and I cannot find one even near the size and thinness. I got it at the 2004 or 2005 State Fair of Texas from a Mexican vendor who has not been back. Tried to get one made on Etsy, but everyone who replied either didn't have thin leather or thin enough zippers, or didn't have brown leather, etc. Very frustrating. Every place I go, they say, "wow, that's really convenient...everything we have is twice the size, sorry". Wish I had the time to take up leatherwork!