It is estimated that more than half of all women are wearing the wrong bra size. This may be due to many reasons, including the fact that more and more woman are buying their bras at chain stores that don’t employ a professional bra fitter.

In the end, it can be an expensive trade off. You may save money by shopping at a store that doesn’t employ a fitter, but end up purchasing bras that are uncomfortable and ill fitting.

Wearing the right size bra is important not only to your comfort, but to your appearance. Unfortunately, many women simply try to guess their bra size. It's time to stop guessing an start measuring. While bra sizes may vary from one manufacturer to another, you can get a general idea of your true size by using the International Bra Size Calculator.

Enter your measurements in the appropriate boxes and click calculate to determine your bra size. Once you hit that button, be prepared for a shock. The size that is displayed will probably not be the size you’ve been buying and wearing. In fact, you might be disappointed to see your cup size go down a letter and your band size go up.

Don’t panic, all bra sizes have sister sizes. The numbers and letters may change but the size is basically the same, so a 34C is generally the same as a 36B or 32D.

Some well known bra manufacturers offer their own online calculators. If you're loyal to a particular brand, you should use the manufacturers calculator to assure a better fit.

Birth and Baby Maternity Bra Calculator

Bra Sizes

Lady Grace

The Breast Guide

My First Bra

My Intimate Things

Nicola Jane Mastectomy Bras

Oprah's Bra Fit Tips

Shopping Life Style

Vassarette