Slim Leather Card Holder

It is so slim that it adds no bulk in suit pants when it just has 15 business cards in it. Of course, it can hold up to 6 or 7 credit cards on each side once it's been stretched out for a few days. To start, stick as many credit cards as you can in there and leave it for a couple of days. Then open stuff another one in each side and leave it. And on and on. But even in a shirt pocket, when used as a business card holder, it's barely noticeable.