a bra that's just right fits like this:
cups:
- The centre front and underwire should sit flat against the body
- The underwire should fit the natural crease of each breast, the breast tissue should be completely encased in the wire
- There should be no bulging or gaping in the cups
underband:
- The band should be level all the way round, and comfortably snug without riding up
- The straps should sit parallel or slightly v shaped behind
- The straps should not dig in to the shoulders