Youth Size Chart
Youth size charts for clothing and shoes: what youth small, medium and large mean by age, height and chest, plus easy US, EU and UK kids' conversions.
Last updated July 2026
Kids' size converter
Pick your child's size in one system and read it across EU, US, UK and Australia, by age, height and chest.
EU 128, US 7-8, UK 7-8, AU 8, Age 7-8, Letter size S, Chest 63 to 67 cm (24.8 to 26.4 in), Height 122 to 128 cm (48 to 50.4 in)
Kids grow fast and brands cut sizes differently, so go by height and chest where you can. For a size from measurements, try the size recommender.
Youth sizes at a glance#
Youth sizes are children’s clothing sizes for roughly ages 5 to 18, labeled youth XS through youth XL or by numeric size 5 to 18. Brands set them by height and chest, not age alone, so two children the same age can wear different sizes.
| Youth Size | US Numeric | Age | Height | Chest |
|---|---|---|---|---|
| XS | 5–6 | 5–6 | 42–47 in (107–119 cm) | 24–25 in (61–64 cm) |
| S | 6–7 | 6–7 | 47–52 in (119–132 cm) | 25–27 in (64–69 cm) |
| M | 8–10 | 8–10 | 52–57 in (132–145 cm) | 27–30 in (69–76 cm) |
| L | 12–14 | 12–14 | 57–62 in (145–157 cm) | 30–33 in (76–84 cm) |
| XL | 16–18 | 16–18 | 62–67 in (157–170 cm) | 33–36 in (84–91 cm) |
In US brands, a youth small (YS) is numeric size 6–7 and a youth large (YL) is size 12–14. Youth XL runs 16–18 and often overlaps an adult small, so teens at the top of the range should compare the adult chart too.
These ranges are compiled from major US youth size charts, including the Nike and Under Armour youth guides below, and cross-checked against standard height and chest measurements. Sizes still vary by brand, so measure height and chest where you can. The full charts below cover clothing and shoes, and the children’s international conversion chart and shoe size recommender help when converting between systems or brands.
In the United States, as well as in numerous other nations, youth sizing typically aligns with a child's age, height, and weight, which simplifies the daunting task of finding well-fitting clothes for youngsters. Yet, the reality of children’s growth patterns is anything but uniform; hence, it becomes crucial to take into account your child's individual measurements instead of merely depending on age as a marker.
To give you an overview, youth sizes can be categorized by age and numeric values, though for more precise information, the charts provided below will be invaluable:
Youth Size Categories:
- Baby: 0 to 24 months
- Toddler: 2 to 6 years
- Child/Tween: 7 to 16 years
- Extended Youth Sizes: Up to 20 years (in some brands)
Letter Sizes and Corresponding Numeric Sizes:
- Youth XS: Size 5-6
- Youth S: Size 6-7
- Youth M: Size 8-10
- Youth L: Size 12-14
- Youth XL: Size 16-18
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How to Measure Your Child#
Before we start looking at measurements and size charts make sure you are accurately measuring your child:
- Height: Have your child stand barefoot against a wall with feet together. Measure from the floor to the top of their head.
- Chest: Measure around the fullest part of the chest, keeping the tape measure horizontal.
- Waist: Measure around the narrowest part of the waist, typically above the belly button.
- Hips: Measure around the fullest part of the hips, keeping the tape horizontal.
- Inseam (for pants): Measure from the top of the inner thigh down to the ankle.
General Youth Size Chart#
| Size | Numeric Size | Age | Height (in) | Height (cm) | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Hips (in) | Hips (cm) |
|---|---|---|---|---|---|---|---|---|---|---|
| XS | 5–6 | 5–6 | 42–47 | 107–119 | 24–25 | 61–64 | 22–23 | 56–58 | 25–26 | 64–66 |
| S | 6–7 | 6–7 | 47–52 | 119–132 | 25–27 | 64–69 | 23–24 | 58–61 | 26–28 | 66–71 |
| M | 8–10 | 8–10 | 52–57 | 132–145 | 27–30 | 69–76 | 24–26 | 61–66 | 28–31 | 71–79 |
| L | 12–14 | 12–14 | 57–62 | 145–157 | 30–33 | 76–84 | 26–28 | 66–71 | 31–34 | 79–86 |
| XL | 16–18 | 16–18 | 62–67 | 157–170 | 33–36 | 84–91 | 28–30 | 71–76 | 34–37 | 86–94 |
Boys' Clothing Size Chart#
| Size | Numeric Size | Age | Height (in) | Height (cm) | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Hip (in) | Hip (cm) |
|---|---|---|---|---|---|---|---|---|---|---|
| XS | 6–7 | 7–8 | 48–50 | 122–127 | 25.5–26 | 65–66 | 23.5–24 | 60–61 | 27–28 | 69–71 |
| S | 8–9 | 8–10 | 50–54 | 127–137 | 26–27 | 66–69 | 24–25.5 | 61–65 | 28–29.5 | 71–75 |
| M | 10–12 | 10–12 | 54–58 | 137–147 | 27–29.5 | 69–75 | 25.5–27 | 65–69 | 29.5–31.5 | 75–80 |
| L | 14–16 | 12–13 | 58–62 | 147–157 | 29.5–32 | 75–81 | 27–28.5 | 69–72 | 31.5–33.5 | 80–85 |
| XL | 18–20 | 13–15 | 62–67 | 157–170 | 32–35 | 81–89 | 28.5–29.5 | 72–75 | 33.5–35 | 85–89 |
Girls' Clothing Size Chart#
| Size | Numeric Size | Age | Height (in) | Height (cm) | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Hips (in) | Hips (cm) |
|---|---|---|---|---|---|---|---|---|---|---|
| XS | 6–7 | 7–8 | 48–50 | 122–127 | 24–25 | 61–63.5 | 22–23 | 56–58.5 | 25–26 | 63.5–66 |
| S | 8–9 | 8–10 | 50–54 | 127–137 | 25–27 | 63.5–68.5 | 23–24 | 58.5–61 | 26–29 | 66–73.5 |
| M | 10–12 | 10–12 | 54–58 | 137–147 | 27–30 | 68.5–76 | 24–27 | 61–68.5 | 29–32 | 73.5–81 |
| L | 14–16 | 12–13 | 58–62 | 147–157 | 30–33 | 76–84 | 27–29 | 68.5–73.5 | 32–35 | 81–89 |
| XL | 18–20 | 13–15 | 62–67 | 157–170 | 33–36 | 84–91.5 | 29–31 | 73.5–78.5 | 35–38 | 89–96.5 |
Youth Shoe Size Chart#
Children's shoe sizes can be confusing due to the overlap between youth and adult sizes. Here's a general guide:
| Youth Size | US Size | UK Size | EU Size | Foot Length (in) | Foot Length (cm) |
|---|---|---|---|---|---|
| YXS | 1 | 13 | 32 | 7.75 | 19.7 |
| YS | 2 | 1 | 33 | 8.125 | 20.6 |
| YM | 3 | 2 | 34 | 8.5 | 21.6 |
| YL | 4 | 3 | 36 | 8.75 | 22.2 |
| YXL | 5 | 4 | 37 | 9.125 | 23.2 |
| - | 6 | 5 | 38 | 9.5 | 24.1 |
Brand-Specific Size Charts#
Some brands have their own youth size charts, in most instances they are very similar to the generally accepted youth sizing guidelines, but it would not hurt to double check the youth size for a specific brand as they use their own acronyms for sizing.
Nike Youth Size Chart#
| Size | Age | Height (in) | Height (cm) | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Hip (in) | Hip (cm) |
|---|---|---|---|---|---|---|---|---|---|
| XS | 7–8 | 47–51 | 119–129.5 | 25.5 | 64.8 | 23.5 | 59.7 | 27 | 68.6 |
| S | 8–10 | 51–55 | 129.5–139.7 | 26–27 | 66–68.6 | 24–25 | 61–63.5 | 28–29 | 71.1–73.7 |
| M | 10–12 | 55–59 | 139.7–149.9 | 27–29.5 | 68.6–75 | 25–27 | 63.5–68.6 | 29–31.5 | 73.7–80 |
| L | 12–13 | 59–63 | 149.9–160 | 29.5–32 | 75–81.3 | 27–29 | 68.6–73.7 | 31.5–34.5 | 80–87.6 |
| XL | 13–15 | 63–67 | 160–170.2 | 32–35 | 81.3–88.9 | 29–31 | 73.7–78.7 | 34.5–37 | 87.6–94 |
Under Armour Youth Size Chart#
| Size | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Height (in) | Height (cm) |
|---|---|---|---|---|---|---|
| YXS / 5–6 | 24–25 | 61–63.5 | 23–24 | 58.4–61 | 47–48 | 119.4–121.9 |
| YS / 7–8 | 25–26.5 | 63.5–67.3 | 24–25 | 61–63.5 | 49–52 | 124.5–132.1 |
| YM / 10–12 | 27–29 | 68.6–73.7 | 25–27 | 63.5–68.6 | 55–58 | 139.7–147.3 |
| YL / 14–16 | 30–32 | 76.2–81.3 | 28–30 | 71.1–76.2 | 61–64 | 154.9–162.6 |
| YXL / 18–20 | 33–35 | 83.8–88.9 | 31–33 | 78.7–83.8 | 66–69 | 167.6–175.3 |
Tips for Shopping Youth Sizes#
- Measure Before You Shop: Always take current measurements of your child before purchasing.
- Check Brand Size Guides: Sizes can vary between brands; refer to the specific brand's size chart.
- Consider Growth Spurts: If your child is in a growth phase, consider buying a size up.
- Read Product Descriptions: Some items may have specific fit information (e.g., slim fit, relaxed fit).
- Look for Adjustable Features: Waistbands with adjustable tabs or clothing with stretch can provide a better fit over time.
- Review Return Policies: Ensure you can exchange or return items if they don't fit.
Frequently Asked Questions#
What are youth sizes in clothing?#
Youth sizes are standardized measurements that correspond to a child's age, height, and weight. They help parents and caregivers find clothing that fits appropriately to their age, height and weight.
How do youth sizes compare to adult sizes?#
Youth sizes are generally smaller than adult sizes. For example, a youth XL might be similar in length to an adult XS but will have a smaller waist and chest measurement. Hence, it is critical to use a youth size chart when looking for youth sizing.
Is a youth large the same as an adult small?#
Not exactly. While the lengths might be similar, adult sizes are cut differently to accommodate adult body proportions.
What size is a youth small?#
A youth small typically corresponds to sizes 6-7, suitable for children aged 6-7 years, with chest measurements between 25-27 inches.
How do I convert youth shoe sizes to women's sizes?#
Youth shoe sizes and women's shoe sizes can overlap. Generally, a youth size 6 corresponds to a women's size 8.
Are boys' and girls' sizes the same in youth clothing?#
Up to a certain age, boys' and girls' sizes are similar. However, as children grow, body proportions change, and sizing may differ.
More youth sizing questions#
Is 5T a youth size?#
No. 5T is toddler sizing, cut roomier for younger kids. Youth sizing starts right after it at youth XS (sizes 5–6). If your child has outgrown 5T, check their height and chest against the chart above rather than going by age alone.
Is 6T a real size?#
Some brands make 6T as their largest toddler size, but many stop at 5T. A 6T overlaps with youth XS and youth S (sizes 6–7), so when a brand has no 6T, measure your child and use the youth chart instead.
What age is youth XL for?#
Youth XL covers kids’ sizes 16–18, which usually fits ages 16–18 at height 62–67 in (157–170 cm) and chest 33–36 in (84–91 cm). Many teens at this size also fit an adult small, so compare both charts before buying.
What is a youth 6 in men's shoes?#
Youth shoe sizes use the same scale as men’s, so a youth 6 is a men’s 6 with a foot length of about 9.5 in (24.1 cm). In women’s shoes a youth 6 corresponds to roughly a women’s 8.
Do youth t-shirt sizes follow the same chart?#
Yes. Youth t-shirts and tops use the general youth chart above, from XS (sizes 5–6) to XL (sizes 16–18). Chest is the measurement that matters most for tees, so size up if your child is between chest ranges.
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