Kids Pants Size Chart: Boys, Girls & All Ages

Are you trying to buy some new pants for your niece or nephew? Perhaps a gift for your grandkid? Or maybe you’re feeling a little lost trying to find the perfect fit for your child?

I love shopping, but buying clothes for my children usually requires a lot of guessing, trying, and unfortunately, returning. Pants have to sit right — they can quickly get too tight and restrictive, or too loose and difficult to keep on.

Dressing room meltdowns are something we all want to avoid, so having a handy kids’ pants size chart is useful.

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    How to Measure a Kid’s Pant Size

    Children’s apparel sizes are usually specified according to age. However, if you want to find the perfect fit, it’s much better to use your child’s height, weight, hip, waist, and inseam measurements.

    Let your child wear skin-tight pants or only underwear — there should be as little padding as possible for an accurate reading. Using a cloth measuring tape, here’s what you do:

    • Hips: Begin by measuring your child’s hips — ensure you place the measuring tape around the fullest part.
    • Waist: Measure the waist by going around the lower belly, near the belly button.
    • Inseam: Measure from the center of the crotch, on the inside of the leg, down to the foot.
    • Height: Let your child stand against a wall, with the feet aligned and back straight. Then measure their height from the top of the head to the floor.

    Once you’ve got the measurements, match them with the clothing brand you’re buying.

    Pants Fitting

    When your child is trying on pants, verify that materials aren’t gathering in the crotch area, especially for boys. There should also be room to breathe around the waist.

    Baby Pants Size Chart (Boys and Girls)

    Baby pants are measured in age, height, weight, and waist. Use our chart as a general guide.

    SizeAgeHeightWeightWaist
    Up to 7 poundsUp to 7 poundsUp to 20.5 inchesUp to 7 pounds16.125 inches
    0 to 3 M0 to three months20.5 to 24 inches7 to 14 pounds16.125 to 17.375 inches
    3 to 6 MThree to six months24 to 27 inches14 to 18 pounds17.375 to 18.5 inches
    6 to 9 MSix to nine months27 to 29 inches18 to 22 pounds18.5 to 19 inches
    9 to 12 MNine to 12 months29 to 30.5 inches22 to 26 pounds19 to 19.5 inches
    12 to 18 M12 to 18 months30.5 to 21 inches26 to 28 pounds19.5 to 20.25 inches
    18 to 24 M18 to 24 months32 to 33.5 inches28 to 30 pounds20.25 to 20.5 inches.

    Toddler Pants Size Chart (Boys and Girls)

    When you move up to toddler sizes, it’s essential to measure the hips and inseam as well. Toddler pant sizes usually range from two to five years. Here’s our general guide:

    SizeAgeHeightWeightHipsWaistInseam
    2TTwo years33.5 to 35 inches30 to 32 pounds20.5 to 21 inches20.5 to 21 inches14 to 14.75 inches
    3 TThree years35 to 38 inches32 to 35 pounds21 to 22 inches21 to 21.5 inches14.75 to 15.5 inches
    4TFour years38 to 41 inches35 to 39 pounds22 to 23 inches21.5 to 22 inches15.5 to 17 inches
    5TFive years41 to 44 inches39 to 45 pounds23 to 24 inches22 to 22.5 inches17 to 18.75 inches

    Girls Pants Size Chart (Five to 13 Years)

    When your girl reaches 5 years of age, brands move up to labels such as XS, S, M, L, and XL.

    SizeAgeHeightWeightHipsWaistInseam
    6 / SFive to six years44 to 46.5 inches45 to 50 pounds24 to 25 inches22.5 to 23 inches18.75 to 20.25 inches
    7 / MSix to seven years46.5 to 50.5 inches50 to 57 pounds25 to 27.5 inches23 to 23.5 inches20.5 to 23 inches
    8 / MSeven to eight years50.5 to 52.5 inches57 to 65 pounds27.5 to 28.5 inches23.5 to 24.25 inches23 to 24.25 inches
    10 / LEight to nine years52.5 to 55 inches65 to 75 pounds28.5 to 30 inches24.25 to 25 inches24.25 to 26 inches
    12 / LNine to ten years55 to 58 inches75 to 86 pounds30 to 32 inches25 to 26 inches26 to 27.5 inches
    14 / XLTen to 11 years58 to 61 inches86 to 100 pounds32 to 34 inches26 to 28 inches27.5 to 29 inches
    16 / XXL11 to 12 years61 to 62.5 inches100 to 108 pounds34 to 36 inches28 to 30 inches29 to 29.5 inches
    18 / XXXL12 to 13 years62.5 to 64 inches108 to 115 pounds36 to 38 inches30 to 32 inches29.5 to 30 inches

    Boys Pants Size Chart (Five to 13 years)

    For boys, you should always ensure there’s enough room in the crotch area. Restrictive clothing in that area can not only make your boy uncomfortable, but can also lead to complications over time. So when you fit pants, add an inch where you feel it’s necessary.

    SizeAgeHeightWeightHipsWaistInseam
    6 / SFive to six years44 to 46.5 inches45 to 50 pounds24 to 25 inches22.5 to 23 inches18.75 to 20.25 inches
    7 / MSix to seven years46.5 to 49.5 inches50 to 58 pounds25 to 26.5 inches23 to 23.5 inches20.25 to 23.25 inches
    8 / MSeven to eight years49.5 to 52 inches58 to 68 pounds26.5 to 27.75 inches23.5 to 24.5 inches23.25 to 24.25 inches
    10 / LEight to nine years52 to 55.5 inches68 to 87 pounds27.75 to 29 inches24.5 to 25.5 inches24.25 to 25.5 inches
    12 / XLNine to ten years55.5 to 58.5 inches87 to 100 pounds29 to 30.5 inches25.5 to 26.5 inches25.5 to 27.25 inches
    14 / XLTen to 11 years58.5 to 61.5 inches100 to 110 pounds30.5 to 32 inches26.5 to 28 inches27.25 to 29.75 inches
    16 / XXL11 to 12 years61.5 to 64 inches110 to 120 pounds32 to 33.5 inches28 to 29.5 inches29.75 to 31 inches
    18 / XXXL12 to 13 years64 to 65.5 inches120 to 125 pounds33.5 to 35 inches29.5 to 31 inches31 to 31.5 inches

    Tips for Buying Pants/Bottoms

    To prevent as many frustrations as possible, we’ve gathered some additional tips for buying pants/bottoms for the above age groups. Let’s start with babies:

    Tips for Babies

    When buying pants or bottoms for babies, there are a few considerations to keep in mind. Avoid buying in bulk for your newborn. Babies grow fast within the first weeks and months, so they will probably change sizes pretty quickly (source).

    • Buy larger: Babies can easily rock pants that are a size or two bigger. Your little one will likely soon enter a growth spurt, and the bottoms will fit just right.
    • Ensure it’s simple: You must consider how easy the pants are to put on and off for diaper changes. Buttons and tiny zippers aren’t ideal when changing a wiggly baby.
    • Go for soft and stretchy: For babies, soft, stretchy materials are best. This ensures optimal comfort as well as easy changing.
    • Opt for elastics: Look for an elastic waistband, even on jeans. Non-elastics may appear cute, but the chances are that they’re uncomfortable for your baby.

    Tips for Toddlers

    As a toddler, your little one suddenly becomes much more independent. Here are some tips:

    • Easy to pull on and off: Opt for pants that are easy to pull on and off. This way, tots can do it themselves if they prefer.
    • Consider the diaper: Not all toddlers have mastered the art of toilet training yet. If so, consider how much room the diaper takes up and ensure you can close the zipper with one on. My little one went down a pant size once the diaper was off.
    • Opt for comfort: It’s best to stick with soft, stretchy materials.
    • Involve your toddler: If you can, bring your toddler along with you when shopping. Pick out two or three pairs and let them choose. You might even get them into the fitting room to try them on.
    • Look for sturdiness: Toddler pants need to be of durable material because of how active the wearers are.

    Tips for Older Kids

    Once your child is out of the toddler years, it generally becomes easier to involve them in the process. Here are some tips:

    • Bring your child: If you can, bring your child with you to the shop. Perhaps let them pick out what they like and have them try it in the fitting room if possible. This way, you’re sure it’s the right fit.
    • Buy one size up: Your child is likely to experience growth spurts up until age 14 for girls and 16 for boys (source). Hence, we recommend buying one size up to avoid having to buy new pants too often. You can always buy a belt for them until the pants fit correctly.
    • Bring a pair of pants: If you’re doing the shopping alone, bring a pair of pants that fit your child. Then use them as a guide for the new ones.
    • Keep measurements with you: You can keep them on your phone or a small piece of paper in your wallet or purse. Make sure to update them as your child grows.
    • Stick to the same brands: Sizes vary between brands, some more than others. If you have a favorite brand, use them for as long as possible to make it a bit easier for yourself.

    International Conversion Chart

    Various countries and continents use different measurements for clothing sizes. If you’re shopping online, or even abroad, you will need a size conversion chart. We’ve made one for you below.

    U.S.UKAustraliaEurope
    22 to 3392 to 98 cm
    33 to 4498 to 104 cm
    44 to 55104 to 110 cm
    55 to 66110 to 116 cm
    66 to 77116 to 122 cm
    77 to 88122 to 128 cm
    88 to 99128 to 134 cm
    1010 to 1111134 to 140 cm
    1212 to 1313140 to 146 cm
    1414 to 1515146 to 152 cm

    What Age Is Juniors Clothing For?

    Juniors clothing is essentially for preteen to teenage girls; there’s no boys’ division. The sizing is a little different, but your daughter could easily upgrade to juniors when she’s in a U.S. kids’ size 14 or 16.

    The sizes go like this:

    SizeHeightWeightHipsWaistInseam
    Junior 3 to 565 inchesUp to 110 pounds34 inches27 inches29 inches
    Junior 7 to 967 inchesUp to 120 pounds36 inches27.5 inches30 inches
    Junior 11 to 1368 inchesUp to 135 pounds38 inches28 inches31 inches

    That’s How Pants Should Fit

    Finding the right pants size for your child can be a challenge. It’s not always possible to bring them with you. That’s why a good kids’ pants size chart is useful.

    It’s important to keep in mind that sizes vary between brands and manufacturers. We recommend you bring the measurements of your child’s height, hips, waist, and inseam, as well as their weight. And remember, buy one size up when in doubt or near a growth spurt age.

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