Brake band size for 4" drum?

[lionhardt64]

What brake band size will I need with a 4" brake drum?

I've seen different people say that different sizes work, so I'm not too sure.

This will go on a yerf dog 3203 by the way.

 

[Doc Sprocket]

Umm... 4"?

 

[lionhardt64]

Thanks. Sites were saying 4 3/16" and others 4", so i was a little confused.