A bra fit guide helps you find the most comfortable and supportive bra by focusing on key measurements and fit tips. To get started, measure your band size (just below your bust) and bust size (around the fullest part of your chest). The difference between these measurements determines your cup size. When trying on a bra, the band should fit snugly without digging into your skin, as it provides the majority of the support. The cups should fully contain your bust without spilling over or gaping. Straps should be adjusted so they don’t dig into your shoulders, but also provide support. A properly fitting bra will feel comfortable, stay in place, and offer both shape and support throughout the day.