The researchers studied whether there was a bra style or brand preference in adolescent girls and adopted a hybrid approach to study the girls’ expectations for bras regarding the comfort, protection, and support they provide, with a view to assessing the function of the bras for adolescent girls. The research took samples from girls aged eight to 18 who are concentrated in Guangdong Province. The researchers found that teenage girls desire improved bras that are properly sized and fit for them, providing comfort, protection, and support. Additionally, the bras that adolescent girls want should not interfere with their daily study or sports activities. Underwear manufacturers can improve the bra design for teenage girls by incorporating the results of this study, ensuring healthy breast development and meeting their needs and expectations.