The band sits level around your ribcage and does not ride up in the back
The band feels snug but not painfully tight
You can fit only two fingers under the band comfortably
The center gore lies flat against your sternum
The cups fully contain your breasts without spilling over
There is no gaping, wrinkling, or empty space in the cups
The underwire, if present, sits on the breast root and does not poke or sit on breast tissue
The straps stay in place without digging into your shoulders
The straps do not slip off your shoulders
The bra supports your breasts without needing constant adjustment
Your breasts feel lifted and centered
The bra does not cause red marks, pinching, or pain after short wear
You can breathe and move comfortably while wearing it
The back band does most of the support, not the straps
The bra stays in place when you raise your arms or bend over
The cups and band feel balanced, with no part of the bra carrying all the tension