According to Norse’s website, a personal item can be a maximum of 15.5 x 11.5 x 5.5 inches with no weight limit, while carry-on bags can be a maximum size and weight of 22 x 18 x 10 inches and 22 pounds.
Premium economy travelers get a bigger personal item, which can be no larger than 17 x 14 x 8 inches. The carry-on size allowance is the same but can be up to 33 pounds.
Each allowed piece of standard checked luggage can be a maximum of 62 linear inches and 50 pounds in all cases. Norse’s website outlines the imposed fees of up to $300 — which apply per person and per leg — if people show up to the airport with oversize, overweight, or unpaid bags.