To those who don’t know, Italians can be super particular about what pasta goes with which condiment. If the recipe says linguine, it’s linguine or you can’t cook the dish. Spaghetti aren’t acceptable.
Also if you sit with some Italians and want to troll them ask them what they think about farfalle (the bowties) and watch the show, most are super opinionated as well.
A quarter or a third of a 500g pack depending on how hungry you are, 125g or 166g. In an Italian menu no more than 100g as a “primo”, where the pasta dish is one of two main dishes and you are supposed to eat bread as a filler.