Of getting the right sized bra!
If you still struggle with how to find your right bra size, let Aging Fabulous school ya...
Are You Wearing the Right Size Bra?
Personally, I would advise that, whenever possible, have a pro measure you. I did so a couple of years back at Victoria's Secret, and it was a few minutes well worth it!
Also keep in mind that different bras are, well, different - so you should have yourself measured whenever possible at whatever store you are thinking of purchasing a bra. Your right size for a VS bra might not be the best size for a Vanity Fair or Hanes!
And just for a bit more bra fun (because gee,there can never be enough can there ladies?) - check out the Wikipedia entry for Brassiere!