Baby Clothes Size Chart | Burt's Bees Baby® (2024)

Shopping for baby clothing can be tough when you’re not sure which size is right for your little one! While sizes are often shown by age, it’s important to use our baby clothes size chart to look at weight and height to determine the best size for your baby.

  • Newborn baby clothes will show as “NB”. This will depend on your baby, but newborn clothing typically fits for 4-6 weeks after you bring baby home from the hospital. Newborn clothes are typically designed to fit babies 6-9 pounds and up to 21.5 inches long.
  • Infant clothing is typically sized using a three-month range: 0-3 months, 3-6 months, etc. Once baby turns one year old, sizes start to use a six month range: 12-18 months and 18-24 months. Our clothes leave room for diapers up until 24 months!
  • Toddler clothing is sized by year and are available from two years old to five years old. These sizes will show with the age and a T. The T stands for toddler. For example, sizes offered for toddlers will show as:
    • 2T for a two-year old toddler
    • 3T for a three-year old toddler
    • 4T for a four-year old toddler
    • 5T for a five-year old toddler
    • If your toddler is in a higher percentile for weight and/or height, you may want to shop for the next size up. The opposite is true if your child is in a lower percentile for weight and/or height.
  • Big kid pajamas are available in sizes 6 years to 12 years and are sized as 6Y, 8Y, 10Y and 12Y.

Our baby sizing chart will hopefully help you find the right fit for baby! If you know baby’s height and weight, you should be able to find the right size clothing for your little bee. If you don’t know their height and weight, try to use their age (preemie, newborn, 0-3 months, 3-6 months, etc.) to choose the right size. For example, if you’re buying pajamas for a newborn baby, you’ll probably select the size newborn or “NB”. Once baby has grown out of newborn sizes, you’ll likely opt for 0-3 months. While sizing is based on ages, baby may be older than 3 months before they’ve grown out of the 0–3-month size. Or the opposite could be true too! Baby may grow out of the size before they hit that age. All babies are different!

Our pajamas come in loose fit “sleep and play” (NB-9 months), snug fit sleepers, and snug fit two-piece pjs. Sleep & Play are loose fit for your little wiggle worms who aren’t yet on the move. Once baby starts to crawl, we have snug fit sleepers. We don’t use harsh flame-retardant chemicals in our 100% GOTS certified organic cotton materials and sleepers must be snug fitting in order to comply with safe sleep standards for babies that are moving and grooving.

Our product pages also have sizing details beneath the product so if you’re looking at a particular product and need more info, simply scroll down a bit to find the size guide. We’re always happy to chat via our chat feature if you have questions!

Click here to see our organic baby pajamas, celebration pajamas, or matching family pajamas.

Baby Clothes Size Chart | Burt's Bees Baby® (2024)


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

Is 0-3 months the same as 3 months? ›

In addition to having a few NB pieces set aside before baby's birth, as a general rule of thumb, it's always smart to size up when you don't know baby's exact size. For instance, when buying clothes for a 3-month-old, opt for the 3-6 month (or larger) size range instead of the 0-3 month range.

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.

What size is 3 months in Carter's? ›

Carter's Little Baby Basics Size Chart
3 mo.9-12.5 lbs.21.5-24"
6 mo.12.5-17 lbs.24-26.5"
9 mo.17-21 lbs.26.5-28.5"
12 mo.21-25 lbs.28.5-30.5"
5 more rows

Is Carter's 2T the same as 24 months? ›

For instance, Carter's 24 month size is designed for a child who is 32.5-34 inches tall and weighs 27.5-30 pounds. The 2T size from the same label is designed for a child who is 34.5-36 inches tall and weighs 29-31 pounds.

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.

When to move up a size in baby clothes? ›

For the most part, baby clothes sizes fall into roughly three groups; Infants, Babies, and Toddlers. These groups are determined by the baby's age. A baby is considered an infant when they are between 0-6 months, bigger babies are considered between 6 to 12 month and Toddlers are 12 months and up.

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).

Will a 2T fit a 12 month old? ›

Size 2T clothing is part of the toddler fit chart, which means the sizing differs from baby clothing. The name “2T” symbolizes the youngest age intended for the garment. For example, the 2T size is for a 2-year-old or 3-year-old child.

What size should a 1 year old wear? ›

Typically, you'll find clothing in 18-24 months, 12-18 months, and 2T. But, if your toddler is in the smaller size, 1T will likely be the perfect fit. Also, if the clothing is labeled 12 months, it likely fits a 9-12 month old best. Typically, 12-month clothing fits babies 28-30 inches in height and 20-24 in weight.

What does 1T and 2T mean? ›

Less than 1 minute remaining. 2 hours remaining. 2 minutes remaining. A: the T stands for toddler, thus 2T is for a two-year old (24 months) and 3T for a three-year old (36 months). Next sizes up are 4, 5, 6 and 6x.

How many onesies for 0-3 months? ›

0-3 Months Clothing Size

Stick to the two outfits a day rule, making sure you have at least 14 different options to experiment with. Onesies and rompers are still excellent choices here. You'll also need to think about the seasons. If it's warm, you might want to stick with layers like onesies and short-sleeved shirts.

How long do babies stay in newborn clothes? ›

Put simply, there is no straightforward answer to the question, “How long do babies wear newborn clothes?” But, here is a general rule of thumb: If your baby weighs eight pounds or less at birth, you can probably expect them to be in newborn sizes for about three to five weeks.

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.

What are the size groups for baby clothes? ›

Baby (NB-24M)
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 18-24 months size 2? ›

Baby Clothes 18-24 Months | Size 2.

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.

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