Hose sizes
 

I'm looking into decorating my engine bay a little but I'm hesitant to buying 'cause I'm not sure of the diameter of my hoses. I measured but not sure if they are 3/8" or 1/4" I'm talking about the windshield-wiper-water hoses vs. the misc. vaccum lines on the intake manifold.

Another thing... do you guys think I should decorate the A/C lines or polish them? Maintaining them polished can be a biatch but it'll give it some shine.