Serving sizes on products have grown in the past few years. The link below contains a great visual that will give you a clue as to how much of that favorite food you can enjoy. Remember a snack should be under 150 calories, so if you reach for that afternoon candy bar, don’t eat the whole thing. I don’t care what the “serving size” states.
And for goodness sake, don’t drink all that balsamic vinegar that you see in this link! It will literally kill you. (I don’t care if they do serve it as an apéritif in Italy.)