Donk: Too long should not be a problem. Just don't roll them down all the way. A condom that is wide enough and an inch or so too long for your penis should be a proper fit. Standard size condoms are about 7 inches long while an average penis is 5-6 inches long, so manufactures obviously expect the "norms" to have about an inch left rolled up when they put on a condom.

(Disclaimer: I'm not speaking from experience here. No one makes a condom that is long enough to cover my entire length.)