Flange Inserts

The flange is the breast pump part that comes in contact with your body when placed onto the breast and nipple, forming a vacuum seal with the areola.

The Luna® breast pump comes with multiple flange sizes and offer smaller inserts to customize the fit within the flange. This reduces the opening of the tunnel where the nipple enters and allows for a more comfortable and effective pumping experience but also helps with the prevention of breast inflammation also called Mastitis.

Flange sizes typically range from 13 to 27mm, depending on the brand. This measurement refers to the beginning of the flange tunnel, not the flange opening. The Luna® Pump includes a standard 24mm flange, a nipple ruler to help you find the right size and inserts ranging from 17mm to 21mm to accommodate a variety of nipple sizes.

To determine the best flange size for you, you’ll need to measure your nipple first.

The Luna® breast pump comes with an handy nipple ruler with holes to make measuring a breeze. Please note that your left and right nipples may have different sizes, so please measure them both to get the exact size of them.

You can also use a regular ruler or tape measurer before ordering.

Please follow our 3 easy steps to find the best size for you.

Stimulate your nipple to make it perk up.

If you are using a ruler or tape measurer: Measure the diameter of your nipple in mm, from base to base. Do not include the diameter of your areola, only your nipple.

If you are using our nipple ruler: Place your nipple into the holes one by one to find out which one you can comfortably fit your nipples into, in a way that your nipple can be out through the hole totally, also the ruler can touch the areola at the same time.

Please note that your left and right nipples may have different sizes, so please measure them both to get the exact size of them.

Use the table below to determine the correct flange size. It’s recommended to choose a flange size that is 1-3 mm larger than your nipple’s size. For example, if your nipple measures between 15-17 mm, we recommend a 19 mm insert.