However, it may happen that security personnel ask you to open individual pieces of baggage for a thorough check. The hand luggage is then searched manually by the staff. As a rule, however, critical objects are easily identified by personnel on the screens.

Airlines primarily check hand luggage using three methods: visual assessment, sizing bins, and weight scales. In 2026, gate agents are trained to look for "bulging" bags that appear larger than the standard 22 x 14 x 9 inch dimensions. If a bag looks oversized, you will be asked to place it in a metal sizer near the gate; if it doesn't fit entirely within the frame, it must be gate-checked. Many international and budget carriers also enforce weight limits, typically ranging from 7kg to 10kg (15-22 lbs). Agents may use hand-held scales or weigh the bag at the check-in counter. New for 2026, some major hubs are testing automated 3D scanners at security or boarding gates that instantly calculate a bag's volume and flag anything out of compliance. To avoid unexpected fees, travelers should measure their bags including wheels and handles, and ensure their "personal item" is small enough to fit completely under the seat in front of them without obstructing the legroom.