So, I'm looking for some ear barbells, and I found these: http://www.piercedfish.com/?page=product&pid=334&psid=657&vmm=0 Now my question is, I have a huge head. I mean, BIG. I have some 10ga spiked ones, and they're pretty small sized. Should I get the 1/2/' or the 5/8'? Which will be bigger in size?