To help you decide which is best for your baby at each stage of development, use our useful nappy size chart. If the nappy is too small, it can leak because there isn’t enough absorbency for the volume of pee or poo To weigh your baby, you can use your normal bathroom scales. Take off your baby’s clothes and nappy, and then step on the scale while holding him or her. Once you find the best nappy size for your little one using our nappy size chart, choosing the right nappy will be a breeze.

As your baby grows, he or she will have different nappy needs. This is why not all nappy types are available in all sizes. For example, the nappy types designed with more active babies in mind start at size 3 or size 4 as your baby will likely be far more active as he grows. At Pampers, we care about your baby's health above all else. That's why we put lots of love into determining what materials we put in our products. For example, if your baby weighs 4 or 5 kilograms a Pampers size 2 nappy might be the ideal size, but if you have a baby who is long and slim you might need to stay with the smaller of the two possible sizes (Pampers size 1) for the best fit.What really sets these nappies apart is the new level of convenience. The wetness indicator, now even more visible, is a lifesaver for busy parents, making it easy to know when it's time for a change. The improved fit and flexibility mean they stay in place and move with my baby, providing an impeccable seal. Pampers has worked with more than 8,000 babies and their parents and taken over 400,000 nappy fit measurements to come up with just the right range of sizes for every family. You may need to go up a size if you notice red marks on your baby’s tummy or thighs when you remove the nappy If the fastening tapes don’t reach the centre of the waistband, it’s time for a bigger size (if the tapes overlap, the nappy may be too big)

If a nappy is too big, urine and poo may run out through gaps between the nappy and the skin before the nappy can absorb it. If you can’t comfortably fit two fingers under the waistband of the fastened nappy, it’s time for a bigger size After the nappy is fastened, you should be able to fit two fingers under the waistband. This means the nappy is fitted properly — not too snug, not too loose.

If your baby regularly gets nappy rash it may be because his or her nappies are too small and don’t hold the moisture away from the skin As you know, babies come in all sizes and shapes, so nappies fit a bit differently on every baby. To keep things simpler, Pampers nappy sizes are based on baby weight – not things like age or gender. If you don’t have scales at home or don’t feel confident about weighing your baby yourself, a health visitor at your local baby clinic will be happy to do it for you at any time.