Most compact and slimmest possible.
Mine holds 3 cards and a single ID. My only requirement is the wallet be made of leather. I've had mine and used the same one for over 10 years.
I'm for a slim bi-fold as well. Enough room for a DL on one side and 3 card slots (that hold 5 or 6 cards) on the other.
Now that I have seen all possible variations of wallets, let me tell you how I keep my little animal skin close to me.
I ordered it as soon as they started the project. Got mine in the first batch they sent.
(battery life - 18 months and range is 100ft)
I made my own wallet out of paper and tape. It holds all of my credit cards and identification. Its really thin and fits nicely in my pocket. I got tired of the george costanza wallet being a literal pain in the butt,
Iam a person cares little about what kind of my wallet is but what is inside. Most of my wallet is like this:
This is my wallet - being 30, I've had a few wallets but this is my favorite.
It's a Louis Vuitton, black leather... no ostentatious LV symbol plastered across the wallet... just a small LV at the bottom that is easy to miss.
This is the wallet I am using at the moment and I love it. It smells great too.
It's from Cabelas and it's made of Kangaroo leather. I love money clip wallets. Whenever I find ones like this, where the money clip is on the inside like that, I buy it right away. I guess it's a bit of an obession for me.