When buying a bra consider the style and fit. Make sure that you have the basic colors like black, nude and white. The rest of the colors will follow.
The style should go with your wardrobe. Look for a seamless one to eliminate lines. There are several kinds of bra. Theres T-shirt bra, convertible, racer back, demi-cup, soft cup and push-up bra.
They could be with underwire or no underwire like the soft cup. Underwire bra gives more support and lifts the shape. They are good for full figured women.
A convertible bra comes in handy. They can save your day. Straps can be converted to crisscrosss, halter, strap set wide and theres some that can be racer back style. This will depend on the clothes that you will wear.
Another kind of convertible bra is the low back bra converter. This style lowers your bra back strap so you can wear low back and backless fashions, and still have the support you need.

T-shirt bras are smooth seamless and molded. They support and comfort. Demi cup has low cut neckline that reveals more of the upper breast. If you have low neckline dress or tops this bra is good.
Some of the bra has front closure. This style eliminates the hooks and bumps on the back.
The only thing is the size is less adjustable. Theres only one hook.
If you are small busted woman a padded bra is good for you. It gives balance to your figure. For women who has large breast look for a minimizer bra. They reduce the size of the breast.
If you want to create cleavage and sexy look use a push up bra. They are designed to raise the breast to create cleavage.

How to get the right fit :
Band size
Measure the area around your ribcage directly under the bust with a tape measure. Use inches.
Make sure the tape measure rest smoothly on your skin. If you have the size add 5 inches to you measurement. (Example 29 + 5 = 34 band size)

Cup size
Measure around your bust but make sure you are holding to the fullest point around your bust but not too tight.
Once you get the measurement subtract the band size from it.
Each addition inch represents a cup size. A is one inch difference, B is two inches difference, C is 3 inches difference and D if theres a 4 inches difference.

..... Back