The key to your bikini doing what it has been designed to do is the fit. If it doesn't fit you properly, it won't support you properly.

The Core Bikini Top:

1. Back size:

The Core bikini top has been designed to be as close as possible to your bra size so you should order your standard back bra size (e.g. 36). Please note that the Core bikini has been designed to fit snuggly on your back size. We do not mean tight (that would be uncomfortable) but we do mean snug. The reason for this is:

1. A lot of the support from the bikini (and your every day bra) comes from the back. If the back is too big, you will lose support

2. Although the Core Swim bikini is fully lined (including the wings) to minimise stretch and maximise support when wet, we want you to be just as confident in your wet bikini as your dry bikini so we've designed it snug (again not tight!) so there is no need for those public adjustments when you get out of the pool.

Advice: If your bikini arrives and the back is not snug, consider a smaller size as you may get a better support. If it is too tight, please consider the next size up.

Note that if you size your back size up or down, you will also need to change your cup size to reflect this (it's called "sister sizing", see below).

2. Bikini cup size:

This is a sister sizing bra size chart. It is quite simple, if you wear a 36FF and the back is too tight, you would go up a back size and down a cup size to a 38F. Or, if the 36FF was too big, you would go down a back size and up a cup size to a 34G (see black arrows):

If the back fits you perfectly but the cup feels big then just go down a cup size to a 36F. Or, if the cup is not covering you as much as you would like or there is bulging, then go up a cup size to a 36G (see the red arrows).

Core Swim Bikini Bottoms:

Our bottoms are designed to fit on the mid-rise. As an estimate, we would say this is half way between your hips and your waist. 

The below table shows the size to order and the range of fit in cm of the circumference of your "mid-rise":

If you would like any further help, please contact us and we will be happy to help.

 International Size Conversions: