They were my very first and I had very few time to make them so I think they could be better, but with some practice I can make really good ones. :-)
The first time I saw this wallet was in the blog Valen Patch. I learned with this video tutorial on Youtube and the free pattern is here, designed by Ruth Jensen.
It's not difficult, but there are lots of details you have to pay attention on.
Ps.: I apologize to my brazilian readers, but this post had to be in English. If you have any questions, just ask.