Strong magnetic clip on the outside for money, cards. Holds everything I need. Due to the magnetic clip I would say it is the same thickness as a traditional thin tri fold wallet. But it contains everything I need. I like the transparent ID card pocket, sometimes it's enough to not have to "take it out" all the time in the store. I don't put it in my back pocket. Front and side pockets only. I think you might not like the shape with the magnetic clip in the back pocket. Has been working for me since last month.