During the height of the mid-20th-century aviation boom, Pan American World Airways (Pan Am) maintained notoriously strict physical standards for its "stewardesses." Typically, applicants were required to weigh between 110 and 135 pounds (50–61 kg) and maintain a "well-proportioned" figure relative to their height, which usually ranged from 5'3" to 5'8". These requirements were not just aesthetic; they were strictly enforced through monthly weigh-ins, and a stewardess could be grounded or fired if she exceeded her maximum allowed weight. By 2026, these historical standards are viewed as a symbol of the era's rigid gender roles and lookism. In the modern industry, such strict weight caps have been replaced by functional reach and safety tests, but the legacy of Pan Am’s requirements remains a key study in the history of airline labor. These women were expected to be "ambassadors" of the brand, requiring them to be single, childless, and under age 28 to maintain the specific image Pan Am sold to its elite international clientele.