My advice to you: use the kids' urinal. You've got the two to four adult urinals placed higher up on the wall, and the one kids' urinal. Use that one, and here's why:

Reason One: Many adult men have hangups about their development. They insist on being called men, they get into arguments about who's got the bigger penis, they do little things in social interaction and traffic to establish dominance over other people. If you can free yourself of this pointless competition you will find yourself moving about society with greater freedom. The public bathrooms are no exception: because the stereotyical unevolved male wants to establish his dominance at all turns, he will not use the kids' urinal. And because he's a stereotypical unevolved male he thinks nothing of pissing all over the goddamned place. He's a fucking slob: he marries a woman to have someone to clean up after him like mom used to; public bathrooms are carte blanche to make a mess at someone else's expense. So he uses the adult urinal and he pisses all over it, he dribbles all over the floor, it's just fucking nasty to be near. The kids' urinals, therefore, are conspicuously cleaner than the adults' facility. It's true.

Reason Two: There's usually no line for the kids' urinal, for the aforementioned reason. The stereotyical unevolved males are jockeying for the big boy urinals.

Reason Three: If anyone gives you any shit about using the "little boy's urinal", you can politely inform them you're actually using the "well-hung urinal". Watch them wrestle with a conflict of ideologies!

And on a related note, guys, I recommend breaking your age-old habit of standing up to piss in a toilet. I sit down for the simple fact it's no treat to clean up urine off the bowl and any walls nearby, even less so if you live with other guys. Just have a seat. I don't think it's particularly impressive to spatter urine all over the place: the word "incontinent" leaps to mind far before "masculine" comes up.