Right up to the top, so that you look all trendy but are struggling to breathe?
Up to the second one down for that smart casual look?
One further down than that, so you've got a bit of breathing space and air of sensual confidence?
Even further down than that, revealing a rugged carpet of raw testosterone, medallion sparkling like a stolen trinket in a magpie's nest?
Do you even wear shirts?

How far up to you button your shirt?