How Long Do Babies Fit In Newborn Clothes?

One of the most common questions that parents have when they’re preparing for their baby’s arrival is how long babies fit in newborn clothes. Generally, there is no straightforward answer to the question but as a guideline, if your baby weighs 8 pounds or less at birth, you can expect them to fit in newborn clothes for about three to five weeks. 

When your baby is still a tiny baby, it may be confusing to find clothes that fit. Newborn clothes are designed to fit babies up to 8 pounds. Usually, babies wear newborn sizes for about three to four weeks before they outgrow them. As they get bigger, they’ll need a larger size. Luckily, they can still fit in newborn clothing until they’re about 12 to 13 pounds.

Whether you’re expecting to become a parent or planning to give a gift, this information is helpful to have in either situation. When it comes to newborn clothes, it is probably best not to spend too much money if the baby will outgrow them within a week or two. 

So, how long do babies fit in newborn clothes? It may depend on several factors, including:


At birth, healthy babies come in a variety of sizes and shapes. Some babies are large and chubby while others may be small and thin. Buying newborn clothing can be a bit of a challenge since clothing sizes are typically based on age rather than height or weight. In other words, if your baby is smaller, you could keep him or her in newborn clothing for a couple of months. 

Growth Rate

Typically, newborns weigh between 6-9 pounds (2.5-4 kilograms), with the average weight being about 7 ½ pounds (3.4 kilograms). According to KidsHealth from Nemours, most newborns grow ½ to 1 inch a month and gain an ounce per day for the first month. Most newborn babies can fit into clothes that are sized for newborns up to 10 pounds.

Baby Clothing Brands

Baby clothing sizes are not regulated, so what one brand considers a newborn size may be different from another brand. Baby clothing sizes differ greatly between brands. For example, some brands run smaller while others run bigger. It is best to go by weight and length when selecting clothes for your baby.

When picking out a coming-home outfit for your own little one or for a loved one’s baby, newborn-size (NB) clothes or something a bit bigger with some room to grow, such as 0-3 months, is the best option. Which one will fit right away? Ultimately, the decision comes down to the baby’s size, which is virtually impossible to predict before birth. 

If you’re buying clothes for a newborn or baby shower gift, follow the same rules. It’s safer to buy clothes a size or two up for newborns than to buy NB-size clothes that may not fit for long – or may never be worn.  

Are Newborn And 0-3 Months The Same Size?

Yes, there are some clothes that are the same size for newborns and 0-3 months. When a baby is born, its head is one-quarter the length of its body. While most infant clothes fit in multiple sizes at once, most brands choose their sizes based on a baby’s age. It’s best to consult the brand’s size chart, which is typically available online. 

By the age of four to six months, their weight doubles. Typically, newborns are between 19 and 21 inches long and weigh between 6 and 10 pounds. When it comes to clothing for 0-3 months, weight typically ranges from 8-13 pounds and is around 22 inches long. So, in general, newborns are smaller than 0-3 months. As babies grow at different rates, there isn’t one specific age at which they become a “0-3-month-old”. 

There is a lot of variation in the size of newborns, so it’s hard to make a generalization. Since newborns grow so quickly, it’s a good idea to buy a few extras in the newborn size just in case you find your baby’s size is too small.

If you find that your baby is too large for a newborn-sized item, you can exchange it for a smaller 0-3 months one. You may also use a newborn-sized set of clothing as a second set.

Can Newborn Wear 0-3 Months?

Yes, A newborn can wear 0-3 months clothing. It really depends on the baby. While some babies can wear newborn clothing at 0-3 months, others cannot because during the first week after birth, babies lose about 5% of their weight.

By 2 weeks or so after birth, most babies will regain their birth weight.

A newborn fits a wide range of sizes, so chances are that your baby will fit into 0-3 Month clothes at birth.

In fact, newborns are typically quite small and their clothes will last them for a while. It’s common for parents to dress their newborn in 0-3 month clothes until they grow into them.

Will A 9-Pound Baby Fit In Newborn Clothes? 

Yes, a 9-pound baby can fit in newborn clothes but it depends on the brand of clothes. It depends on the clothes. Newborn clothes are designed to fit babies who weigh between five and eight pounds. A nine-pound baby may or may not be able to wear them, depending on the brand and design of the clothes. 

Manufacturers, such as the baby clothing giant Carter’s, offer newborn sizes that fit babies weighing 6 to 9 pounds and measuring 18 to 21.5 inches long. Some newborn clothes are specifically designed for larger babies, so a nine-pound baby should be able to wear them comfortably. However, many brands of newborn clothes are too small for a baby who weighs more than eight pounds. 

Conclusion | How Long Do Babies Fit In Newborn Clothes?

Hopefully, after reading this post you know how long do babies fit in newborn clothes. It depends on the baby’s weight and size. Most babies can wear newborn clothes for about two months. 

However, some babies may only be able to wear them for a month while others can wear them for up to four months. At birth, your child will probably fit into a newborn size for three to four weeks if they are under 8 pounds. Baby clothes are usually worn from about three to five weeks old and sometimes even longer if they’re very small.

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How Long Do Babies Fit In Newborn Clothes?

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