Diaper size 5: until what age or weight of baby?

Your baby is starting to walk and is showing signs of wanting to do everything on his own. And for some time now you've been feeling that your baby's diapers are too small .

You're wondering if it's time to upgrade to the next size up: size 5. How much does your baby need to weigh to go up to this size? Should you use diapers or diaper pants? We answer all your questions in this article.

Everything you need to know about size 5 diapers

The size 5 diaper is suitable for babies weighing between 11 and 25kg. It is estimated that a baby can wear it on average from 18 months. Obviously, it all depends on your child's morphology. Some babies will switch to a size 5 diaper as soon as they blow out their first candle.

The size 5 is, like the size 4 diaper, worn for several months by your baby.

When should I start using size 5 diapers?

To know when to choose the next size up diaper, look for several things, if :

  • You observe recurrent leaks;
  • You can no longer fit two fingers between the diaper and your baby's tummy;
  • You notice red marks on your baby's skin when you change his diaper;
  • You have trouble closingyour baby's diaper;
  • Your baby makes you feel that his or her diaper is too small, for example by pulling on the diaper.

All of these indicators should let you know that the diaper size is no longer appropriate and that it's time to change.

How many size 5 diapers should I buy for my baby?

As with size 4, size 5 diapers are diapers that will be worn for a long time. Don't be afraid to stock up on several packs of diapers in this case. They will be used.

You will find below a summary of the number of packages of diapers to buy according to the weight and age of your baby:


Number of packages in size 4

Number of packages in size 5

Number of packages in size 6

from 10,5 to 12,5 kg



from 12,6 to 13 kg


from 13,1 to 13,5 kg



+ more than 13,5 kg


If you're wondering if you should consider cloth diapers rather than size 5 diapers, they have both advantages and disadvantages: they are easier to put on and take off. Diapers are especially good for potty training.

It is estimated that potty training begins around the age of 2 years old, depending on your child's development. So, if your baby is still under the age of 2, it's best to stick with diapers.

Once your baby has blown out his second candle, it will be easier to teach him to be potty trained. At that time, the transition to diapers or training pants will be interesting.

However, for the night, it is preferable to keep classic diapers.

How to choose the best size 5 diaper?

Beyond choosing the right size diaper, it is important to choose a good quality diaper, soft and comfortable for your baby, and especially healthy.

Indeed, your baby's skin is very fragile and is in direct contact with his skin.

To ensure that a diaper is healthy and made of skin-friendly materials, several criteria should be taken into account:

  • First of all you can check the chemical analysis results of the diaper brands. Make sure that they do not contain toxic products. If you can't access the analysis, it's a bad sign;
  • Beware of claims like "dermatologically tested", "hypoallergenic" or "FSC certified". These mentions are mandatory and do not guarantee the non-toxicity of the diapers;
  • Then check the composition of the diaper in detail to make sure that it does not contain substances such as perfume, lotions, allergies and irritations. Also check that the elastic of the diaper does not contain latex;
  • Then you can also check the bleaching method used. Today, most diapers are bleached using the ECF (Elementary Chlorine Free) method which uses chlorine derivatives, and only 5% of diapers on the market use the TCF (Totally Chlorine Free) method which does not use chlorine or chlorine derivatives;
  • It is also advisable to choose ecological or organic disposable diapers rather than conventional diapers. The brands of ecological or organic diapers are generally more careful about the choice of their raw materials and the manufacturing process. The more natural materials a diaper contains, the better.

One might think that ecological diapers are less absorbent. But this is totally false: organic and/or ecological diapers absorb as well as or better than disposable diapers.

Ecological diapers will actually reduce the concentration of synthetic material in the absorbent part, and replace it with natural cellulose.

Baby is growing: when to change to a size 6 diaper?

Your baby is still growing and you wonder if it's time to switch to size 6 diapers ?

As with the change from size 4 to size 5, if you notice regular leaks, red marks on your baby's skin, and if you can no longer fit two fingers between the diaper's elastic and your baby's tummy, it means it's time to move up to the next size.

To potty train your baby, we recommend using training pants. They work on the same principle as diapers, but they allow you to reduce your waste considerably.

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.