@Ceili,
Ceilli, I carry a crossover bag that is basically an oversized wallet. It's 8" x 6" by 1.5" thick.
It's a Brahmin Mojito.
I only use crossbody bags because they are better for posture, and leave you completely hands free.
I purposely keep only a small bag so I won't be carrying a suitcase with all sorts of junk.
When I open it up, it's basically a place for your drivers license on one side, and credit cards and such on the other. There's an inside pocket for paper money/coins. The back of the bag has a slot for my cell phone. Finally, both wings on the bag have zippered compartments for other papers, if needed.
What I like most about the bag is that there's no need to ever take it off my person. When I need something, it stays where it is while I open it to expose the area with my license and cards.
I've never carried makeup, tissues, or any of that "girly" useless stuff. I don't even carry a comb.
Another benefit of carrying something small is that my better half would never think of carrying something for him, because I don't have the room.
I'm not much of a stuff person.
Here's the outside and inside of the exact bag I have: