It depends on where you keep your keys. If it's in your pocket, the Chico Bags are too big: these things are about 3"x4" and at least 1.5" thick. You can easi

It depends on where you keep your keys. If it's in your pocket, the Chico Bags are too big: these things are about 3"x4" and at least 1.5" thick. You can easily clip them to a belt loop if you don't mind the aesthetics of the result. And if you have any sort of purse, bag, fanny pack, etc, they would probably fit in there, or clip on to it, fine. But actually putting them on a keyring that lives in a pocket doesn't work, at least for me.