Delta Air Lines Carry-on Luggage Rules
Delta Air Lines allows each passenger one carry-on bag and one personal item. The carry-on luggage size limit is 22.0 × 14.0 × 9.0 in (approx 55 × 35 × 22 cm). There are no weight restrictions for Delta Air Lines carry-on baggage on most routes.
Your personal item, such as a purse, laptop bag, or backpack, must fit under the seat in front of you. Exact dimensions are not specified on Delts website.