Many women think they have been a B Cup for years and as their size changes they increase the back size, maintaining the B Cup. The way bras are designed, cups are graded so that the volume of the cup changes depending on the back size. So if you are a 38B, the volume of the cup is the same as 36C, the same volume as a 34D, the same volume as a 32DD and a 30E. So if you were a size 32B when you were 16 and and are now wearing a 36B, then the cup size is the same volume as a 32AA, in other word your boobs have shrunk by two cupsizes. Or more likely you are wearing completely the wrong size bra. The vast majority of women who have not been properly fitted, find that they are smaller in the back and bigger in the cup than the size they have been wearing. They also find they can't believe the difference a properly fitted bra makes to the way they look.

So how can you tell if you are wearing the wrong size bra? Well there are a number of things to look out for.

• Does the back ride up
• Do the straps fall down
• Do the bra cups gape
• Does the bra wire dig into your breast tissue.
• Does the bra make you look as though you've got four boobs.

So why not have a day out to your local specialist lingerie shop, where you can be properly fitted, most don't charge for fitting and contrary to popular belief the bras they sell are not overly expensive. 

Of course you could go to a department store and be measured, but measuring isn't fitting and does not take account of  what styles work for you and your shape. It also doesn't take account of the fact that different bras, sometimes even from the same manufacturer will fit differently.