Yes, the British Airways carry-on size limit strictly includes wheels, handles, and any side pockets. In 2026, the maximum dimensions for your main cabin bag are 56 x 45 x 25 cm (22 x 18 x 10 inches). British Airways is known for having one of the most generous hand baggage allowances in the industry, allowing you to bring both this main bag and a smaller personal item (up to 40 x 30 x 15 cm) with a combined weight of up to 23kg (51lbs). However, because the airline uses "sizing crates" at many gate areas, a bag that is exactly 56cm long plus the height of the wheels will likely fail the fit test and be sent to the hold, potentially incurring a fee if you are on a "Basic" (hand-baggage only) fare. It is a common mistake for travelers to measure only the "box" of the suitcase; when shopping for luggage in 2026, look for "Global" or "International" carry-on sizes specifically, as "Domestic" U.S. sizes are often slightly different. Always measure your bag from the floor to the top of the retracted handle to ensure you are within the 56cm limit and avoid a last-minute stress at the boarding gate.