Measuring ruler
Quelques millimètres peuvent changer votre tirage.
Mesurez chaque mamelon séparément, sans inclure l’aréole, lorsque le mamelon est au repos, idéalement 1 heure avant ou 1 heure après une tétée ou un tirage. Vos deux seins peuvent avoir besoin de tailles différentes.
Choisissez ensuite la taille correspondant à votre mesure : si votre mamelon mesure 14 mm, utilisez un insert ou une téterelle de 14 mm.
Téléchargez gratuitement la réglette Balulu et trouvez votre taille.
Quels sont les avantages de la réglette Balulu ?
- Précision et simplicité : Un outil clair et facile à utiliser
- Confort et efficacité : Une taille adaptée permet d'éviter les douleurs et d'optimiser l'expression du lait
- 100% gratuit : Disponible en téléchargement immédiat sur notre site
- Soft siliconefor more comfort
- 11 to 22 mma size to the millimetre
- Sold individuallythe right size for each side
- Compatiblewith many breast pumps
Which insert is right for you?
Choose your breast pump, then the measurement of each nipple (at the base, without the areola). We'll tell you if your size is already included or which insert to add.
Not measured yet? Get the free ruler or ask us on WhatsApp.
size already included with the pump
Too big, or too small?
Compatible with your breast pump?
Our inserts fit Balulu breast pumps and many models on the market. Since the tunnel shape varies, check your model before ordering.
- Full list of compatible models
- Models to check or not recommended
- Personal answer if yours isn't listed
Complete your pumping routine.
Tick what you need. Everything arrives in the same parcel.




Your questions, our answers
How do I know if I need an insert?
An insert can help if your standard flange size feels too big, or if pumping is uncomfortable: the nipple rubs, the areola is pulled in, pumping hurts or milk flows less well.
A better fit makes pumping more comfortable and calmer day to day.
How do I choose the right size?
Measure only the nipple diameter, without the areola. We recommend starting with your exact size: in most cases it gives the best comfort and efficiency. Our free ruler can help.
What if I'm between two sizes?
Start with the one closest to your actual measurement (or take both). Ask yourself whether you feel friction, whether there's too much space around the nipple, or whether your nipple is very sensitive or elastic. Our team can also help you.
Which breast pumps is this insert compatible with?
Our inserts are compatible with Balulu breast pumps and many standard models on the market. As compatibility can vary with the flange shape, check our compatibility list or contact us.
Is the insert sold individually or in pairs?
The insert is sold individually. If you use a breast pump for double pumping, add 2 inserts to your cart. This lets you order exactly the size you need for each side.
How do I clean my insert?
After use, wash it carefully with warm water and a suitable product, then let it dry completely before the next use.
How often should it be replaced?
It depends on how you use it. Replace it if you notice visible wear, loss of flexibility, deformation, or if it's no longer as comfortable as at first.
Can my size change during breastfeeding?
Yes, it can change over time. It may help to measure again if what you feel changes.
Need help choosing your size? Message us on WhatsApp →
Hi, I measured 16 and 17 mm, what should I get?
Hi! Start with your exact sizes: one 16 mm insert and one 17 mm.
Great, and if it rubs?
Message us after your first session and we'll adjust together.
Une question ? On vous accompagne.
Choix de la taille, prise en main, première séance : notre équipe, formée à l'allaitement, vous conseille avant et après l'achat.

