Rooster or hen???

[dwgov]

I need some help. My chickens are about 12 weeks old. One of them I think is a rooster. He or she is about twice the size of the others and has a bright red crown. Can't tell by feathers. Here's a some picks. What do you think? The pics don't really do justice. Also its head is much large
r.

 

[sourland]

Your suspicions are correct. That's a cockerel.

 

[dwgov]

Thanks so much... I thought so

 

[dwgov]

Just curious I sorta new at this, what's the give away?