Everything You Need To Know About Bras

•  Make a list

Go to the store armed with a list of what bras you need and plan to buy. This will vary from person to person but two nude bras, two black bras, one strapless, one sports bra and one bra without underwire for comfort is a good starting point.

• Know your body type

Be aware of your body type so you know what bras to look for. For example, if you are more of a top-heavy "apple" shape, you will likely be looking for fuller coverage bras, not demi-cups. If you're not sure what type you are, a full guide by body type can be found in Luciani's guide to all things bras, The Bra Book.

• Check transparency

Wear or bring a thin T-shirt to the store so you can see what each bra looks like under the sheerest of circumstances. You don't want any surprises the first time you wear it!

• Be open-minded about your size

If you're surprised (or disappointed), remember that the bra size is just a number (and a letter). The proper fit of the bra is the most important part.

• Be flexible

If you're in a bind and there's a bra that you really love but they don't have your size, it's usually OK to go up a band size and down a cup size – or vice versa.

• Have a discerning eye

Don't be afraid to put the bra on and face yourself in the mirror with a critical eye. If you see any gaps, spillage, digging in or other signs of poor fit, it's not the right bra. Turn around and look at the back as well. The back band can be very telling too when it comes to proper fit. There should be no gaping, riding up or bulges.

• Get accessories

Don't forget to pick up some bra accessories, too, so you avoid any faux pas depending on what you'll be wearing. Breast petals and double-sided tape are always good to have on hand.

• Don't get stuck in a size rut

Write down the date of your visit and be sure to plan another one six months to a year later (bra sizes fluctuate due to weight gain, hormonal changes, aging and other life changes, so it's important to get fitted at least once a year). Bras also need to be replaced every six months to a year due to wear and tear.

• Take good care of your bras

Once you make your purchase, it's up to you to take good care of your bra. It's best to hand wash, but if you need to put it in the washing machine, make sure the bra is encased in a protective garment bag. Always air dry – never put your bras in the dryer.

Almost 80 percent of women wear the wrong size bra, so follow these tips to make sure you pick the right size every time.