Nike is one of the most purchased kids' clothing and shoe brands globally. The labelling system changes several times as children grow, girls and boys diverge meaningfully in the alpha sizes, and the Plus fit covers a different height range than you might expect.
Find your child's Nike Kids size
Enter your child's measurements and we'll show the right size — plus how long it will last.
Size recommendations are based on official brand size charts and are provided as a guide only. Fit may vary by item, style, and individual child. Outgrow is not responsible for sizing decisions made based on these recommendations.
Does Nike Kids Run Big or Small?
At 112cm our reference child (53.5cm waist, 58.5cm hip) fits Nike size 6 with a standard waist of 57–58.5cm — approximately 3.5–5cm of room above their measurement. This is consistent with how Nike designs sportswear — cut for movement.
| Brand | Size | Waist (cm) | Hip (cm) | vs ref child |
|---|---|---|---|---|
| Nike | 6 | 57–58.5 | 62–65 | +3.5–5cm |
| Under Armour | 6 | 57–60 | 62–65 | +3.5–6.5cm |
| Adidas | 5-6Y / 2XS | 56 | 64 | +2.5cm |
| H&M | 116 | 54 | 60 | +0.5cm |
| Zara Kids | 111–116 | 55 | 62 | +1.5cm |
| Old Navy | 6 | 53 | — | Average |
Sportswear brands run approximately 2–5cm more generous in the waist than fashion brands at 112cm. For the full methodology see our cross-brand sizing research. See also our complete kids clothing size chart comparing 36+ brands side by side.
Nike Kids Sizing System
Baby (Preemie to 24M/2T)
Age-based labels. Unisex. Nike is one of the few brands to include Preemie sizing from 38cm.
Little Kids (4–6X/7)
Numeric labels. Gendered from size 4. The 6X/7 size covers 116–122cm — bridging the gap Adidas leaves uncovered.
Older Kids (XS–XL)
Alpha labels. Girls diverge significantly — wider chest and hip than boys at the same height from XS onwards. Plus fit available from S.
Nike Boys Tops
| Size | Height (cm) | Chest (cm) | Weight (kg) |
|---|---|---|---|
| Preemie | 38–50 | 32 | — |
| 0M / NB | 50–56 | 37–42 | 2.7–4.3 |
| 3M | 56–62 | 42–44 | 4.5–6.6 |
| 6M | 62–68 | 44–46 | 6.8–8.1 |
| 9M | 68–74 | 46–47 | 8.3–10 |
| 12M | 74–80 | 47–50 | 10.2–11.3 |
| 18M | 80–86 | 50–52 | 11.6–12.7 |
| 2T / 24M | 86–92 | 52–53 | 12.9–13.6 |
| 3T | 92–98 | 53–56 | — |
| 4T | 98–104 | 56–58 | — |
| 4 | 98–104 | 56–58 | — |
| 5 | 104–110 | 58.5–61 | — |
| 6 | 110–116 | 61–63 | — |
| 6X / 7 | 116–122 | 63–66 | — |
| XS | 122–128 | 64.5–66 | — |
| S | 128–137 | 66–69 | — |
| M | 137–147 | 69–75 | — |
| L | 147–158 | 75–81.5 | — |
| XL | 158–170 | 81.5–88.5 | — |
6X/7 covers 116\u2013122cm \u2014 a height range Adidas skips entirely.
Boys Tops — Plus
| Size | Height (cm) | Chest (cm) |
|---|---|---|
| S Plus | 128–137 | 70.5–76.5 |
| M Plus | 137–147 | 76.5–83.5 |
| L Plus | 147–158 | 83.5–91 |
| XL Plus | 158–170 | 91–98 |
Nike Girls Tops
| Size | Height (cm) | Chest (cm) | Weight (kg) |
|---|---|---|---|
| Preemie | 38–50 | 32 | — |
| 0M / NB | 50–56 | 37–42 | 2.7–4.3 |
| 3M | 56–62 | 42–44 | 4.5–6.6 |
| 6M | 62–68 | 44–46 | 6.8–8.1 |
| 9M | 68–74 | 46–47 | 8.3–10 |
| 12M | 74–80 | 47–50 | 10.2–11.3 |
| 18M | 80–86 | 50–52 | 11.6–12.7 |
| 2T / 24M | 86–92 | 52–53 | 12.9–13.6 |
| 3T | 92–98 | 53–56 | — |
| 4T | 98–104 | 56–58 | — |
| 4 | 98–104 | 56–58 | — |
| 5 | 104–110 | 58.5–61 | — |
| 6 | 110–116 | 61–63 | — |
| 6X / 7 | 116–122 | 63–66 | — |
| XS | 122–128 | 64.5–68 | — |
| S | 128–137 | 68–73 | — |
| M | 137–146 | 73–79 | — |
| L | 146–156 | 79–85.5 | — |
| XL | 156–166 | 85.5–92.5 | — |
Girls chest diverges from boys at XS onwards. By L, girls chest is 79\u201385.5cm vs boys 75\u201381.5cm.
Girls Tops — Plus
| Size | Height (cm) | Chest (cm) |
|---|---|---|
| S Plus | 128–137 | 73.5–80.5 |
| M Plus | 137–146 | 80.5–87.5 |
| L Plus | 146–156 | 87.5–96 |
| XL Plus | 156–166 | 96–105 |
Nike Boys Bottoms
| Size | Height (cm) | Waist (cm) | Hip (cm) | Weight (kg) |
|---|---|---|---|---|
| Preemie | 38–50 | 33 | 33 | — |
| 0M / NB | 50–56 | 39–43 | 39–43 | 2.7–4.3 |
| 3M | 56–62 | 43–46 | 43–46 | 4.5–6.6 |
| 6M | 62–68 | 46–47 | 46–47 | 6.8–8.1 |
| 9M | 68–74 | 47–48 | 47–48 | 8.3–10 |
| 12M | 74–80 | 48–50 | 48–51 | 10.2–11.3 |
| 18M | 80–86 | 50–52 | 51–53 | 11.6–12.7 |
| 2T / 24M | 86–92 | 52–53 | 53–54.5 | 12.9–13.6 |
| 3T | 92–98 | 53–54.5 | 54.5–57 | — |
| 4T | 98–104 | 54.5–56 | 57–60 | — |
| 4 | 98–104 | 54.5–56 | 57–60 | — |
| 5 | 104–110 | 56–57 | 60–62 | — |
| 6 | 110–116 | 57–58.5 | 62–65 | — |
| 6X / 7 | 116–122 | 58.5–61 | 65–67 | — |
| XS | 122–128 | 59.5–61.5 | 68.5–71 | — |
| S | 128–137 | 61.5–65 | 71–74.5 | — |
| M | 137–147 | 65–69 | 74.5–79.5 | — |
| L | 147–158 | 69–72.5 | 79.5–84.5 | — |
| XL | 158–170 | 72.5–75.5 | 84.5–89.5 | — |
Boys Bottoms — Plus
| Size | Height (cm) | Waist (cm) | Hip (cm) |
|---|---|---|---|
| S Plus | 128–137 | 65.5–70.5 | 75.5–81 |
| M Plus | 137–147 | 70.5–76 | 81–87 |
| L Plus | 147–158 | 76–82 | 87–93.5 |
| XL Plus | 158–170 | 82–88 | 93.5–100 |
Nike Girls Bottoms
| Size | Height (cm) | Waist (cm) | Hip (cm) | Weight (kg) |
|---|---|---|---|---|
| Preemie | 38–50 | 33 | 33 | — |
| 0M / NB | 50–56 | 39–43 | 39–43 | 2.7–4.3 |
| 3M | 56–62 | 43–46 | 43–46 | 4.5–6.6 |
| 6M | 62–68 | 46–47 | 46–47 | 6.8–8.1 |
| 9M | 68–74 | 47–48 | 47–48 | 8.3–10 |
| 12M | 74–80 | 48–50 | 48–51 | 10.2–11.3 |
| 18M | 80–86 | 50–52 | 51–53 | 11.6–12.7 |
| 2T / 24M | 86–92 | 52–53 | 53–54.5 | 12.9–13.6 |
| 3T | 92–98 | 53–54.5 | 54.5–57 | — |
| 4T | 98–104 | 54.5–56 | 57–60 | — |
| 4 | 98–104 | 54.5–56 | 57–60 | — |
| 5 | 104–110 | 56–57 | 60–62 | — |
| 6 | 110–116 | 57–58.5 | 62–65 | — |
| 6X / 7 | 116–122 | 58.5–61 | 65–67 | — |
| XS | 122–128 | 59.5–61 | 68.5–73 | — |
| S | 128–137 | 61–64 | 73–78.5 | — |
| M | 137–146 | 64–68 | 78.5–83.5 | — |
| L | 146–156 | 68–71.5 | 83.5–88.5 | — |
| XL | 156–166 | 71.5–74.5 | 88.5–93.5 | — |
Girls hip diverges from boys at XS onwards. By L, girls hip is 83.5\u201388.5cm vs boys 79.5\u201384.5cm.
Girls Bottoms — Plus
| Size | Height (cm) | Waist (cm) | Hip (cm) |
|---|---|---|---|
| S Plus | 128–137 | 67.5–74.5 | 79.5–85.5 |
| M Plus | 137–146 | 74.5–82 | 85.5–92 |
| L Plus | 146–156 | 82–90 | 92–99 |
| XL Plus | 156–166 | 90–99 | 99–107 |
Nike Kids Shoe Size Chart
Nike uses C (Child) suffix for baby/toddler shoes, transitioning to Y (Youth) at US 1Y / EU 32 / 20.1cm foot length.
| US | EU | UK | Foot length (cm) |
|---|---|---|---|
| 1C | 16 | 0.5 | 9.1 |
| 2C | 17 | 1.5 | 10.0 |
| 3C | 18.5 | 2.5 | 10.8 |
| 4C | 19.5 | 3.5 | 11.6 |
| 5C | 21 | 4.5 | 12.5 |
| 6C | 22 | 5.5 | 13.3 |
| 7C | 23.5 | 6.5 | 14.2 |
| 8C | 25 | 7.5 | 15.0 |
| 9C | 26 | 8.5 | 15.9 |
| 10C | 27 | 9.5 | 16.7 |
| 11C | 28 | 10.5 | 17.6 |
| 12C | 29.5 | 11.5 | 18.4 |
| 13C | 31 | 12.5 | 19.3 |
| 1Y | 32 | 13.5 | 20.1 |
| 2Y | 33.5 | 1 | 20.9 |
| 3Y | 35 | 2.5 | 21.8 |
| 4Y | 36 | 3.5 | 22.4 |
| 5Y | 37.5 | 4.5 | 23.2 |
| 6Y | 38.5 | 5.5 | 23.8 |
| 7Y | 40 | 6 | 24.6 |
Frequently Asked Questions
Does Nike kids run big or small?
Nike kids clothing runs generous in the waist compared to fashion brands — approximately 3.5–5cm above average at 112cm. This is by design for active wear. In height terms Nike runs true to size. If buying Nike for everyday rather than sport, consider whether the roomier waist will work for your child’s build.
How does Nike kids sizing compare to Adidas?
At 112cm Nike size 6 (waist 57–58.5cm) is slightly more generous than Adidas 5-6 years (waist 56cm). Both run generous compared to fashion brands. Nike includes a 6X/7 size covering 116–122cm while Adidas skips this height range entirely.
What age is Nike kids size 6?
Nike size 6 covers heights of 110–116cm. Most children reach 110cm around age 5–6, though height varies significantly. Always use your child’s actual height rather than age.
What is Nike kids Plus sizing?
Nike Plus is a wider fit available from size S (128–137cm) through XL. Plus chest measurements run approximately 6–10cm above standard. Plus bottoms run approximately 4–8cm wider in the waist. Available for both boys and girls.