Even if it’s not always easy to navigate the jungle of diaper sizes—and you may end up buying diapers that are either too big for your child or that leak regularly—these four tips will help you find the right fit. Here, you’ll learn which diaper sizes are available and what to look for when shopping.

What diaper sizes are available?

Most children wear diapers from birth until toddlerhood. That’s why diapers come in sizes 1 to 7, designed to meet very different needs depending on age. To choose the right diaper size, your child’s body weight is key. Size 1 diapers are available for newborns weighing from two kilograms. Sizes then go up to 7, which can fit older children weighing up to 30 kilograms and more. If these no longer fit your child, there are training pants like the , which can be worn like shorts. Some diaper manufacturers use their own sizing systems, often including intermediate sizes with greater absorbency, such as diaper size 4+. At LILLYDOO, diapers are available in sizes 1, 2, 3, 4, 5, 6, and 7. You can see the corresponding weights in the table:

Which diaper really fits?

Sometimes diapers don’t fit well, even if they match your child’s weight. That’s because, just like adults, children can vary greatly in height and build. Ideally, the diaper shouldn’t pinch and shouldn’t be too loose. Only then can your baby move comfortably without leaks. Since babies grow in spurts—and often very quickly—it’s always a good idea to keep a pack of the next size on hand. After birth, you’ll only need size 1 diapers for a few weeks. That’s why it makes sense to buy a pack of size 2 diapers when putting together your initial supplies. With the you can then test whether size 3 already fits, without having to buy a large pack right away.

When it's time to try the next size

Several signs can indicate that it’s time to try the next diaper size. For example, you’ll notice a diaper is too small when it no longer closes properly without constricting your child’s tummy. Always check the fit by gently slipping two fingers into the waistband at the waist. If the diaper feels snug without pressing, the size is just right. The diaper should also not dig into the legs. Are diapers leaking frequently? Then try the next size up to see if it improves the fit. Larger diapers or intermediate sizes also tend to have higher absorbency, which can be especially helpful at night when several hours pass before the next change.

Just try it out

Maybe your baby is very petite or has a sturdier build. In that case, the sizes based on weight alone may simply not fit well. Or perhaps you’ve found a great diaper in the right size that, after a growth spurt, suddenly doesn’t fit your child from one day to the next. Try not to stress when buying diapers—simply test different sizes. With the practical you can conveniently order diapers from Newborn size 1 delivered to your home. If your little adventurer grows faster than expected and needs a larger size, you can return the too-small diapers and reschedule your next delivery with the updated diaper size through your user account.