Italian Barbershop

It you are planning on visiting a barber shop in Italy for a haircut, this is the Italian translation you are looking for: più corti ai lati, più lunghi sopra.

If your Italian is limited, once you say the above phrase, that's about it for your input for your haircut.  If you ask a friend for how to ask for a haircut and they don't say something like the above phrase, beware, they just told you to ask for the pattern of a soccer ball to be shaved into your head.  Especially if the phase includes the words 'pallone da calcio'.