Is a backpack a personal item volaris? Most airlines have strict weight and dimension limits for carry-on bags. therefore, not for your own use. The regulations for personal goods are much less specific than those for carry-on bags. Some airlines don't even offer any recommendations for personal items. Airlines that do have restrictions on personal items don't have a defined size for what they allow. Even inside North America, the sizes may vary by 3-5′′ in each dimension depending on the airline you're travelling.