what size bag can i carry on the plane
Passengers are typically allowed one carry-on bag to fit in the overhead bin, which can be no larger than 9 inches by 14 inches by 22 inches. Fliers can also bring one personal item such as a purse or laptop bag that fits under the seat in front of them.
Delta also notes that its carry-on bags may not exceed 45 linear inches, including handles and wheels and adds, Baggage must fit easily in the carry-on baggage check (approximately 22 inches by 14 inches by 9 inches or 56 by 35 by 23 centimeters), which is located near the check-in counters..