Diaper size 2: until what age or weight of baby?

Your baby has already been here for a few weeks, and you quickly understood that you were going to have your nose in diapers for a few more months (years?)! You were using size 1 diapers a few weeks ago, but now your little one has grown and feels cramped in his current diaper. So, at what age and weight is it time to use size 2 diapers for your baby?

Everything you need to know about size 2 diapers

Size 2 diapers have the same characteristics as the other sizes: they are generally composed of a skin-contact layer, anti-leak barriers, an absorbent material and an anti-leak material. What differs, not surprisingly, is the size ! Indeed, slightly wider at the waist and thighs, the front and back ears to be scratched adapt to the growing body of your baby. The more we go forward in the diaper sizes, the less useful it is to talk about the age of the baby : we reason rather thanks to his weight to to choose his diaper sizeThe more you go up in diaper sizes, the less useful it is to talk about your baby's age: you should rather use your baby's weight to choose your diaper size, because growth and weight curve vary from one newborn to another. Size 2 diapers are traditionally indicated for babies from 3 to 6 kg.

When should I start using size 2 diapers ?

It is therefore possible to use size 2 diapers as soon as your child weighs more than 3 kg, up to 6 kg. This generally corresponds to the 2 to 4 months period for the infant, if we consider his weight curve linear and without any problem (and it is not always the case !).

How many size 2 diapers should I buy for my baby?

The first three months, the baby wets about 8 diapers per day, so it is common to consume 1 whole pack of diapers in 3 to 4 days! So plan a few packs in advance, without anticipating too much either, because growth spurts or a sudden change in his weight could surprise you!

You will find below a summary of the quantities of diapers to plan for the first 100 days of your child, based on a pack ofabout 30 diapers. It is purely indicative because each child has his own growth rhythm at this age.


1st month (Nbr of packs of diapers needed)

2nd month (Nbr of packs of diapers needed)

3rd month (Nbr of packs of diapers needed)

from 2,5 to 3kg

8 packs Size 1

8 packs Size 1

4 packs size 1, 4 packs size 2

from 3,1 to 3,3kg

8 packs size 1

6 packs size 1, 2 packs size 2

8 packs size 2

from 3.4 to 3.6kg

6 packs size 1, 2 packs size 2

4 packs size 1, 4 packs size 2

8 packs size 2

from 3.7 to 3.9kg

4 packs size 1, 4 packs size 2

8 packs size 2

6 packs size 2, 8 packs size 3

+ over 4kg

1 pack size 1, 7 packs size 2

8 packs size 2

8 packs size 3

How to choose the best size 2 diaper?

In the same way as for the other sizes: namely an irreproachable innocuousness and an absorption without fault!

Because your baby is in permanent contact with the diaper's materials during the first 2 - 3 years of life, it is important to ensure that theacidity, humidity and chemical composition of the diaper do not promote redness and other irritations on his buttocks. To do this, find out about the composition of the different layers that make up the baby's diaper: contact layer, absorbent mattress, anti-leak material, outer material etc...

The analysis reports must also be accessible, if it is not the case, beware of this lack of transparency!

When you become a mom or dad, you want to give your baby the best. But, many marketing claims are not based on reliable information or are mandatory for all diapers and panty liners (hypoallergenic, dermatological control etc...). Studies are regularly published to warn about the safety of diaper compositions, notably by consumer associations or the French National Health Safety Agency and the DGCCRF.

Both disposable and cloth diapers have advantages and disadvantages. Cloth diapers are more ecological, but in terms of cleanliness and risk of irritation, disposable diapers are preferred.

Baby is growing : when to change to a size 3 diaper ?

Several signs may indicate that it is time to change from size 2 to size 3:

  • You have more and more difficulty to fasten the back ears on the waist, or these detach quickly;
  • Your child is cramped and has the diaper mark on the skin at diaper change;
  • You notice more leaks or explosive overflow; in case of recurrent leaks, you can keep wipes in your diaper bag
  • It is no longer possible to put two fingers between baby's belly and his diaper.

In this case, it's time to change size and opt for the diapers size 3.

Les informations issues des articles présents sur le site www-elia-lingerie.com sont des informations générales. Bien qu’elles aient été relues par des professionnels de santé, ces informations ne sont pas exemptes d’erreurs, ne constituent pas des conseils de santé ou des consultations et n’ont pas vocation à fournir un diagnostic ou proposer un traitement. Ces informations ne peuvent, en aucun cas, se substituer à un avis médical et ne peuvent pas remplacer une consultation auprès d’un professionnel de santé. Pour toute question, nous vous invitons à consulter votre médecin.