A member's comment on another thread, I give his idea a shot...
I to dislike bulky wallets. I haven't carried a wallet in a hip pocket going on 3+ decades; I carry a sleeve in my front pocket. I tried a money clip at first, but since I don't have much or carry much paper money I was needing something else.
I carry my DL, credit card, health insurance card and that's about it. I might stick another special purpose card in but that depends on the trip.
So what do I use? My EDC (for the last 8 years or so) has been a Saddleback Leather business card holder sleeve. Securely carries 4 credit card sized cards. Plastic cards do not easily slide out and are held securely in the leather. Plus, it only looks better with time.