Mizuno Womens Active Training Bra Top

It's essential to wear a sports bra when taking part in any type of sport or exercise. A good fitting sports bra will be supportive holding the bust firmly and spread the weight of the bust onto the shoulders and back preventing painful movement and long-term tissue damage causing the bust to sag.

Impact Levels

Sports bras are generally categorised by impact level the highest rating is impact level 4 or Extreme. This means it's suitable for running, football, tennis, horse riding etc. Even if you have a small bust you still need a bra suitable for your activity. Medium impact level three is suitable for running etc if you are cup size A or B and impact level 2 is suitable for general gym wear, yoga, pilates, cycling, weight training etc. Please see the impact level chart below for a rough guide to workout which impact level you require for your chosen activity.

Bra Sizing

It is estimated that 70% of women are wearing the wrong size bra, so please take the time to take a couple of simple measurements, then use our sizing charts below to work out which size of sport bra will fit.

1. Wearing a good fitting bra (not underwired or balconette), stand in front of a mirror so you can check the tape measure keeps straight around your back, measure immediately under your bust. This is commonly known as your band, chest or rib size measurement. Now find your bra size on the chart below

Chest / Band / Back Measurement

2. Now measure the fullest part of your bust. The difference between your bra size and this measurement will give you your cup size. 1 inch difference would be cup size B, two inches difference would be cup size C. Simple when you know how!

Chest / Bust Difference

International Chest / Band Size Conversion

International Cup Size Conversion