similar settis, I get it cut like every 5 months when it starts getting too long and in my face
I also don't know how to eggsblain what I want, so the barber always does his best. one time he did a great job and asked if he could take a photo of me to put on his website, I said sure, and asked him to send me the pics too. now I show that pic when I go to the barber and say "I want that", and he usually gets the idea.
unfortunately I am starting to lose my hair and I think having it cut that short doesn't look so good anymore, so I'm back to the same vague instructions which comes with the same lottery of results
my colleague the other week mentioned his barber who happens to be on my street, some frenchman. the colleague said he's cheap and reliable, and said colleague has experienced similar hair loss settis to me (but more advanced stage, so I saw the progress), and he always seemed to have a good haircut. so I'm gonna try the guy out, maybe this weekend