According to Federal Aviation Administration regulations, the total height, width and depth of your carry-on bag cannot exceed 45 linear inches, or 22 inches by 14 inches by 9 inches. Check with your airline for its carry-on luggage guidelines, as restrictions vary among airlines.
Most airlines allow passengers to bring one personal item in addition to a carry-on bag. For example, American Airlines allows passengers to bring both a carry-on bag and one personal item, such as a purse, laptop or briefcase, as long as the item can fit under your seat and its combined height, width and depth does not exceed 36 inches. Check with your airline for personal item guidelines and restrictions.
Approved carry-on items that do not count as either carry-on luggage or a personal item include a jacket or other outerwear; an umbrella; a book or newspaper; a stroller, diaper bag and child restraint devices; and mobility devices, such as a wheelchair, a walking cane or crutches
