A well-fitting bra should feel supportive, comfortable and natural throughout the day.
The band should sit comfortably around your body without riding up. Your cups should fully contain your bust without spilling over or leaving empty spaces.
The straps should stay securely on your shoulders without digging into your skin. You should also be able to move comfortably without constantly adjusting your bra.
Remember — the perfect fit is the one that makes you feel supported while still feeling like yourself.