I have hand made many different sizes of belt pouches. For one built like this one in a different size - just send me the dimensions that you'd like one for you to be.
The leather used for it is about 4 ounce moccasin cowhide - very soft, supple, and durable leather.
Often, I've built these with long braided leather shoulder or wrist straps. I've also added an applique or monogram to it.
The large #10 YKK brass zipper used is very strong and long lasting.