A nappy might leak if it is too small. The absorbent material in the nappy core cannot then cope with the volume of wee. It might be time to consider moving up a nappy size especially if your baby is near the top of the weight range for that size. Other signs that your baby's nappy is too small include:
- The nappy isn't covering your baby's bottom properly.
- You notice it's tight around your baby's waist or thighs.
- The nappy is consistently wet-through.
Bigger nappies can handle more, but nappies may also leak because they are too big. Our nappies have stretch in them, so they are comfortable for a baby. If the nappy isn't fitted snugly on your baby then it is likely that the nappy could leak.