Children's Clothing Sizes 101: Your Guide to Getting the Right Fit

children's clothing sizes


If you're shopping online, finding the appropriate clothing for children that fits your child well and doesn't look too big or too small can be difficult. After all, you want your child to look their best as they go into school in the fall, not stand out like a sore thumb due to mismatched or ill-fitting clothes.

Kids' clothing sizes range from XS-XXL. Use our kids' clothing size chart and baby clothes size chart to determine the right fit for your child.


Children's clothes sizes are measured in inches and vary depending on the child's age. Toddler clothes are typically measured by weight, while children's clothing sizes are determined by height. 

Most children aged 18 months to 8 years wear size 4-7, while children aged 8-14 wear size 7-14. 

While busy parents consider baby clothing the same, some clothes are small enough for toddlers and older kids. However, baby clothes may not be right for toddlers or older kids and may result in a wardrobe full of mismatched items. Below are the sizing categories you will typically see:

  • Baby (Preemie, 0-24 months)
  • Toddler (2T-6T)
  • Little Kid (4-6X)
  • Big Kid or Tween (7-16)
  • Extended sizing (18-20)

Check out our Darth Vader Helmet - Pink Toddler short sleeve toddler or youth crew neck; it is available in sizes 2T to 5/6T and Youth Small to Youth XL. 


The universal size is appropriate for children aged between 3-24 months. So, for example, if you're looking for clothes for your 18-month-old toddler, you should be shopping in the store's 3-24 month section.  

Slim and husky sizing is also available. Slim sizing is for kids on the smaller end of the spectrum, while husky sizing is for kids on the larger end. 

However, it is essential to note that girls' body proportions differ from boys, so make sure you buy the correct-sized baby clothing for each child based on their actual measurements! 

If you are not sure what size may fit your kid, take a look at our size chart, which includes height and weight measurements.


Universal children's clothing size ranges from newborn (0-3 months) to kids (12-14 years). Baby clothes size ranges from preemie or newborn up to 24 months. Kids' clothing size ranges from 2T, 3T, and 4T up to 12 and 14. 

Proper clothing sizes vary widely between manufacturers, but the best rule of thumb is that kids' clothes are sized by age and child height. For example:

  • 2-year-olds usually wear 18-month clothes
  • 3-year-olds usually wear 24-month clothes
  • 5-year-olds usually wear 7/8th or 8/10th-grade sizes

To understand boys' and girls' 

clothes sizes, check out our baby clothes sizing charts below. You can also use these international conversion charts for infant baby clothing sizes. 


As a general rule, babies' clothing is sized by age. For example, newborn clothing is sized NB (for newborns), infant clothing is sized by month (e.g., 0-3M), and toddler clothing is sized by age (e.g., 2T for two-year-olds).


Nursery clothing typically ranges from newborn 0-3 months, 3-6 months, and 6-9 months. The most popular styles are onesies, pajamas, and jumpsuits. 

Retailers will sometimes offer sizing based on age, while others will offer standard XS-XL sizing, which typically means:

  • XS – 4-5 years.
  • S – 6-7 years.
  • M – 8-9 years.
  • L – 10-11 years.
  • XL – 12-13 years.

Check out our Weiner Skater short sleeve toddler or youth crew neck; it is available in sizes 2T to 5/6T and Youth Small to Youth XL. 


We understand that shopping for your children can be an overwhelming experience. Of course, you want them to look fashionable and feel comfortable in their clothes, but you also want their clothing to be safe and age-appropriate.

How to Take Measurements for the Children's Clothing Size?

The big question is: what size is right for my child? You will need a flexible tape measure to take body measurements of a child for clothing sizes. It can be useful for accuracy to dress the child in light clothing.

The first step in finding the perfect fit is determining your child's height (in inches) by measuring from their head to the floor without shoes on. 

The chest should be measured around the fullest part of the child's chest. That is typically under the armpits. The waist can be measured about one inch above the belly button. Measuring hips is done around the fullest part of the child's hips. When measuring, make sure the tape is not too tight. 


When it comes to an inseam, this measurement is needed for jeans and pants. The inseam can be measured from the bottom of the ankle to the inner thigh.


Once you have done that, use the size conversion chart below to determine which corresponding size best suits your little one.


XXS(3-4 years)

XS(5-6 years)

S(7-8 years)

M(9-10 years)

L(11-12 years)

XL(13-14+ years)


39.5 - 43.5"100 - 110 cm

43.5 - 47"110 - 120 cm

49 - 53"125 - 135 cm

55 - 59"140 - 150 cm

61 - 65"155 - 165 cm

67 - 69"170 - 175 cm


23.5"60 cm

24.5"62 cm

25.5 - 26.5"65 - 67 cm

27.5 - 28.5"70 - 72 cm

0.5 - 32"77.5 - 81 cm

33.4 - 35"85 89 cm


22.5"57 cm

23"58.5 cm

23.5 - 24.5"60 - 62 cm

25.5 - 26.5"65 - 67 cm

27.5 - 28.5"70 - 72 cm

29.5 - 30.5"75 - 77 cm


24"61 cm

25"63.5 cm

26 - 27"66 - 69 cm

28.5 - 29.5"72 - 75 cm

30.5 - 32"77.5 - 81 cm

33.5 - 35"85 - 89 cm


18.75"47.5 cm

20.5"52 cm

22.5 - 24"57 - 61 cm

25.5 - 27.5"64.5 - 70 cm

28.5 - 29.5"72 - 75 cm

30.5 - 31.25"77.5 - 79.5 cm

Sleeve length

21"53 cm

22"55.5 cm

23 - 24"58.5 - 61 cm

25 -26.8"63.5 - 67.9 cm

28.3 - 29.75"71.8 - 75.6 cm

31 - 32"78.7 - 81.3 cm


The scale for measuring children's clothing sizes differs from the one used for adults. Additionally, children's clothes are sized differently in different countries, so it's important to understand the relevant size

 conversion chart. The US size 100, for example, is equivalent to the European size 140 or the UK size 180. 

For reference, the average height of a 10-year-old American girl ranges from about 3'7 (1.09 m) up to 4'2 (1.27 m). 

Boys are typically taller on average than girls at these ages. Boys aged ten range in height between 3'9 and 4'5 (1.14-1.37 meters), while girls in this age range are between 2'11 and 3'5 (0.93-1.06 meters).

A child who is three feet tall and weighs fifty pounds will wear size 6 in America, but it would be roughly comparable to UK size 12 or French size 54. 

Conversely, an eighteen-pound child would wear a US size 18, but it would be roughly similar to a French Size 38.

Children grow out of clothes quickly, so ensure you have enough clothes in your child's wardrobe that will last through all stages of their growth spurt.

Check out our Notorious BIG Sister Toddler Short sleeve toddler or youth crew neck; it is available in sizes 2T to 5/6T and Youth Small to Youth XL. 

What Age Fits 110?

The 110 sizes are for children aged 5 - 6 years. It is best for kids around 42 inches in height and weighs around 117/143Ib (53/64.8kg).

US Size 

Baffle Gear Size




80/85 cm

30-34 in

20-30 lbs


90 cm

34-38 in

26-33 lbs


100 cm

38-42 in

31-38 lbs


110 cm

42-46 in

37-48 lbs


120 cm

46-50 in

45-55 lbs


130 cm

50-54 in

52-64 lbs


140 cm

54-58 in

62-80 lbs


150 cm

58-62 in

75-95 lbs


160 cm

62-66 in

88-110 lbs

Have a look at our You Think You're Tough? My Uncle's A Marine Toddler and Notorious RBG Toddler short sleeve toddler or youth crew neck; they are available in sizes 2T to 5/6T and youth small to youth XL. 


When it comes to kids, parents have it tough. The clothes are too expensive and the wrong size. Unfortunately, there are just so many things that can go wrong when shopping for children's clothes, but with this guide, you can now avoid these fashion faux pas and get the right fit for your child. 

At Baffle Gear, we're committed to ensuring all families know about their local options for buying affordable kids' clothing. So please stop by one of our stores or click on our website for more information about what we offer. 

Remember, we sell top-quality brands at great prices. So you can shop guilt-free, knowing that your little ones will be dressed in style without breaking the bank!


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