One thing I learned at Victoria's Secret -- the front of the bra between the cups should lie flat against you. If there's a gap, the bra is not fitting correctly.
Unfortunately I don't know if there is a rule of thumb for what to try next in that situation, like if it's a size issue or just that particular brand/style is wrong for you.
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles