Baggage allowances vary by airline, route, and ticket class, but common standards apply. Carry-on baggage typically allows one main bag (often up to 22 x 14 x 9 inches / 56 x 36 x 23 cm, including handles and wheels) plus a small personal item (like a purse or laptop bag) that fits under the seat. Checked baggage usually permits 1–2 bags, each up to 50 lbs (23 kg) and 62 linear inches (158 cm total dimensions).