According to standard airline regulations, your personal item—such as a purse, laptop bag, or small backpack—must be placed entirely under the seat in front of you. This space is designed to keep your essential items within reach while ensuring that the overhead bins remain available for larger carry-on suitcases. The bag must not obstruct the aisle or the area near your feet during taxi, takeoff, and landing, as this poses a safety hazard in the event of an emergency evacuation. If you are seated in a bulkhead row (the first row of a section with a wall instead of seats in front), you are generally prohibited from keeping any items at your feet; in this case, your personal bag must go into the overhead bin for the duration of takeoff and landing. Once the aircraft reaches cruising altitude and the "fasten seatbelt" sign is turned off, you are usually permitted to retrieve your bag. It is also important to ensure that your bag does not exceed the airline's specific dimensions for a personal item, which typically hover around 18 x 14 x 8 inches, to ensure it actually fits beneath the seat structure without protruding.