in × 10 in), including protuberances like wheels, handles, and pockets. The IATA guidelines are voluntary; the actual size and weight limits of cabin baggage imposed by airlines differ widely. In some cases they are dependent on the aircraft model being used, in other cases it depends on the booking class. † Dimensions are sometimes listed as "linear", meaning that when added together, height, width, and length are not to exceed a certain total number. - Air New Zealand - Hainan Airlines Business class, first class passengers and holders of high level mileage club members are often allowed to carry on a second bag of a similar or smaller size and weight. On smaller sized aircraft, sometimes the hand baggage can be carried to the aircraft door, where it is collected by baggage handlers for stowing in the cargo area and returned to the passenger right after landing. Security restrictions Following the increase in restrictions imposed on flights from UK airports and to the US after the events of August 2006 transatlantic aircraft plot, hand baggage on such flights was restricted to one cabin bag no bigger than 45 cm × 35 cm × 16 cm (17¾" x 13¾" x 6¼") effective since 15 August 2006. On 21 September 2006, the British Airports Authority advised that from the following day, the allowable size of the single item of hand baggage on outgoing flights from the UK would be increased to 56 cm × 45 cm × 25 cm (approx. 22 in × 17.75 in × 9.85 in), the IATA guideline size. Most UK airports still have a strict limit of one piece of cabin baggage per passenger, including business class. European Union A common regulation for cabin baggage restrictions was introduced on 6 November 2006 in European Union and in Switzerland, Norway and Iceland. Restrictions on liquids: only liquids with max 100 ml (3½ fl. oz.) per piece all pieces assembled in a single zippable plastic bag of max 1000ml (1 quart) the plastic resealable bag must not exceed 20 cm by 20 cm (8" x 8") maximum of 1 plastic bag per passenger liquids include gels and lotions (shampoo, tooth paste), lip sticks, moist paper tissue, contact lens solution Exceptions: prescribed medicine of any size, non-prescribed medicine-only items baby milk and other items for infants nutrition for diabetes diet Restrictions on dangerous objects: weaponry, including imitations and sports utilities