We are flying TAP air from SFO to Zurich via Lisbon this summer. Our carry-on bags seem to be just a bit (3-4 cm) over the maximum total dimensions and the depth dimension that TAP air allows for "hand" baggage. I also see TAP has fairly restrictive size and weight limitations for the "personal item" that you can also carry on the plane with you (4.4 lbs!).
I am wondering how closely they enforce these rules if passengers are just a bit over them? My experience with U.S. domestic carriers is that they don't enforce to the letter so long as you are close. Not sure how true that is internationally or with this particular airline.