Baby Clothing Size Guide & Charts | Bespoke Baby (2024)

Baby Clothing Size Guide & Charts | Bespoke Baby (1)

Nicolette Harris |

Understanding Baby Clothing Sizes

Whether you’re a new or soon-to-be mum or someone looking to buy lots of little and practical gifts, shopping for newborns (and toddlers) can be intimidating. That’s because of the confusing clothing sizes.

Similar to adults and clothing sizes, babies come in a variety and shapes and sizes, and varying heights and weights. And baby clothing sizes, similar to adults may differ from brand to brand and region to region.

When buying baby clothing online, always look for a size chart. Good brands of baby clothes will over more than just an approximate age, they should also provide an approx weight and height measurements to help guide you through your baby's growth spurt andbuying newborn baby clothes online. Let's face it, getting to the shops with a newborn is not always easy, and you definitely don't "try on" the newborn clothes when your there!

Another thing to be aware of is global sizes. Many American Brands or European Brands are sold in Australia and do not necessarily confirm to the sizes we see and know in our large department stores.

When babies grow, you'll often hear parents size they are going into size "xyz". But if the truth is told, a normal baby wardrobe consists if a mix of sizes. It can be a little frustrating when all you want to do is clear out all the size 000 | 0-3 months and replace with a bunch of new size 00 | 3-6 months, however some of the size 000 still fit and some of the size 00 are too big. Don't fret too much about what the tag says, stick with what fits best and if comfortable for your baby girl or baby boy.

Here are the baby clothing sizes explained.

Sizes Guide for Buying Baby Clothing in Australia

Size 00000 | Premature

This one is the smallest in the market and is typically used by premature babies. In general, they’re for babies who are less than 45 cm long and 2 kg heavy.

Size 0000 | Newborn

This size 0000 is a safe bet unless the baby is particularly smaller or bigger than average. It’s great for newborns from roughly 0 to 4-6 weeks old with an approximate height of up to 56 cm and a weight of up to 4 kg. For a "home outfit" this is the best size to choose.

Size 000 | 0-3 Months

This one is good for newborns, too, as they grow big quickly, anyway. This size is best for up to 3 months, although you may want to double-check if the baby is at the tail end of that range.

This size is best for babies who are approximate height of 62 cm in length and up to 6 kg in weight.

Size 00 | 3-6 months

Babies weighing up to 8 kg with a height of up to 68 cm should get a size 00. This is the average size for babies between 3 to 6 months old.

Size 0 | 6-12 months

At this newborn clothes sizes, shopping starts to get more fun as it’s the most common size. As such, you’ll have more varied options in fabric and design.

Size 0 is great for babies between 6 to 12 months old with 10 kg of weight and 76 cm in height.

Size 1 | 12-18 Months

This size, as the name suggests, is perfect for children around the 1-year-old mark. It’s intended for babies up to 18 months, weighing up to 12 kg and measuring 84 cm.

Baby Clothing Size Guide & Charts | Bespoke Baby (2)

American and European Baby Clothing Size Guide

Newborn Size

This is typically for new babies between 0 and 4-6 weeks with an approximate weight of 1.8kg to 3.7kgs and an approximate height of 43cm - 50cm

3 Months

This is very similar to size 000 | 0-3 months. The approximate weight of the baby should be 3.7kgs to 5kg and estimate height range between 48cm - 58cm

6 Months

This is almost the equivalent of size 00 | 3-6 months. The guide for approximate weight is between 5kg - 6.8kg and the rough length of the baby is approximate between 58cm - 67cm

9 Months

Unlike Australian baby clothing size charts, our American and European counterparts have a more incremental approach to baby clothing sizes. Enter the 9M size. The estimated weight range is between 6.8kg - 8.1kg and the approximate height to be between 67cm to 73cm

12 Months

This is fairly close to size 0 | 6-12 months. The guide for approximate weight is 8.3kg - 9.1kg and the approximate height around 73cm - 78cm

If you want to know what kind of clothes are good for newborns or what's the difference between a romper, onesie and bodysuit? Head to our other blogBaby Clothes Explained: Your Guide to Buying Online

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Baby Clothing Size Guide & Charts | Bespoke Baby (2024)

FAQs

What is the size chart for baby clothes? ›

Amazon Essentials Sizing²:
Label / SizeWeight (pounds)Height / Length (inches)
P (Preemie)Up to 5 lbsUp to 17”
N (Newborn)5 – 8 lbsUp to 20”
0 – 3 months8 – 12.5 lbs20 – 23.5”
3 – 6 months13 – 16.5 lbs24 – 25.5”
7 more rows

How to estimate baby clothing size? ›

A general guide to baby clothing sizes is as follows:
  1. Premature: 5 lbs and under.
  2. Newborn: 5-8 pounds.
  3. 3 Months: 8-12 pounds.
  4. 6 Months: 12-16 pounds.
  5. 9 months: 16-20 pounds.
  6. 12 Months: 20-24 pounds.
  7. 18 Months: 24-28 pounds.
  8. 24 Months: 28-30 pounds.
Jul 7, 2023

What are the size groups for baby clothes? ›

Baby (NB-24M)
SizeWeightHeight
Preemieup to 6 lbs / up to 2.7 kgup to 17 in. / up to 43 cm
Newborn6-9 lbs (9M)/ 2.7-4.1 kgup to 21.5 in. / up to 55 cm
0-3 months (3M)9-12.5 lbs / 4.1 - 5.7 kg21.5 - 24 in. / 55 - 61 cm
3-6 months (6M)12.5 - 17 lbs / 5.7 - 7.7 kg24 - 26.5 in. / 61 - 67 cm
4 more rows

Is 1T the same as 12 months? ›

The difference between 1T and 12 months is the way it's made. For example if the 12 month old is not walking yet it's best to get 12 months it's easier to slide a shirt off the shoulder and down where as 1T is not made like that. Thanks is the only difference.

How does baby clothes sizing work? ›

The Basics: Babies Grow at Their Own Pace

In general, baby clothing is sized by age. Newborn clothing is marked as NB (for newborn), infant clothing is marked by month (for example, 0-3M) and toddler clothing is marked by age (for example, 2T for two-year-olds).

How do I estimate my baby's size? ›

The two most commonly used methods to estimate fetal weight are ultrasound and clinical examination. Currently, ultrasound is preferred because of its ease of use, objectivity and precision.

What size do babies wear the longest? ›

The longest a baby usually wears newborn is about 1-2 weeks after their due date (even if born early- by the due date they are usually in newborn size). Therefore, for a new baby gift, I would go with a 3M (0-3M) or 6M (3-6M) size to get a little longer wear.

What size clothes to buy when having a baby? ›

Newborn clothes: sizes

Size 000 is intended to fit babies from 0-3 months, and size 00 is for babies from 3-6 months. Some bigger newborns might be ready to go straight into a size 00. You might have to roll up the sleeves, but it won't be for long.

How do I know what size to buy my newborn? ›

While the size marked on the label make it seem like it's based on baby's age, it's really based on size. For example, “preemie” § usually fits babies up to 17 inches long and five pounds. “Newborn” (NB) represents an average baby at birth up to 21.5 inches long and five to eight pounds.

Should you size up or down with baby clothes? ›

Typically, it's time to size up when your baby's clothes start to feel snug or difficult to put on. Look for signs like tightness around the arms, legs, or chest, or if the fabric starts pulling at the zips or snaps.

How to understand baby size? ›

Here's a concrete example: Baby Gap's 3-6-month size range fits babies 12-17 pounds and 23-27 inches, while Carter's 3-month clothing fits babies 9-12.5 pounds and 21.5-24 inches and their 6-month clothing fits babies 12.5-17 pounds and 24-27 inches. The difference between 9 and 12 pounds is a lot in babies.

How do you sort baby clothes by size? ›

When you're organizing baby clothes, start by laying everything out by the size on the label. If you notice that certain items look a little small bump them down into the smaller size group. If the item looks bigger move it over to the larger size group.

How does Carter's baby sizing work? ›

Regardless of the age listed on the tag, baby clothing sizes are typically based on weight and length. For example, Carter's 6M sizing generally fits babies 12.5 to 17 pounds and 24 to 27 inches long, but as babies come in all shapes and sizes, not all 6-month-olds will be in this range.

Is 3 months the same as 3,6 months? ›

The main difference between cloths that say 3mo and ones that say 3-6mo is that the company admits they don't know how old of a baby it will really fit, but think it's probably in that range. The 3-6 months tend to be sized to fit up to 6 months, and the 3 months ones are sized roughly for 2-4 months.

Is 2T the same as 24 months? ›

Most brands size baby clothing in age ranges that end in the highest month. For example, 24 month items are generally made for 18-24 month old babies. 2T (as in toddler) is intended for 2-3 year old kids. You'll often find that 2Ts are a bit longer, more than anything.

What does 3t 3a mean in baby clothes? ›

A: Yes basically-after 24mths or at 2yr old-toddler clothes are labeled as 2t, 3t, etc just meaning toddler instead of infant size so as example 3t would generally fit a 3yr old.

Is Carter's size 3 months 0-3 or 3-6? ›

So 3 month is essentially equal to 0-3 month for other brands and is similarly listed as 8-12.5 lbs. So you want to make sure you store you Carter's clothing with the appropriate sizes: 3 month with 0-3 month clothing, and 6 month with 3-6 month clothing, etc.

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