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Children's Clothing Size Guide

Find your child's correct clothing size in US, EU, and UK sizing — by age, height, or weight. Includes a complete reference chart from newborn through 14 years.

Or enter years × 12 (e.g. 3 years = 36)

Complete Size Reference Chart

AgeUSEUUKHeight (cm)Weight (kg)
PrematurePreemie44Tiny Baby0–440–2.2
0–1 monthNewborn50–56Newborn45–562.3–4.5
0–3 months0–3M56–620–3M56–623–6
3–6 months3–6M62–683–6M62–685.5–7.5
6–9 months6–9M68–746–9M68–747–9
9–12 months9–12M74–809–12M74–808.5–11
12–18 mo12–18M80–8612–18M80–8610–12.5
18–24 mo18–24M86–9218–24M86–9211.5–14
2 years2T922Y88–9512.5–15
3 years3T983Y95–10314–17
4 years4T1044Y100–11015.5–19
5 years51105Y107–11617.5–21
6 years61166Y114–12219.5–24
7 years71227Y120–12821.5–27
8 years81288Y126–13424–30.5
9–10 years1014010Y134–14628–36
11–12 years1215212Y144–15834–45
13–14 years1416413–14Y155–17042–55

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How to Measure Your Child for Clothing

Getting accurate measurements takes two minutes and ensures a better fit — especially for online purchases. For toddlers, measure when they are standing calmly or have someone distract them with a book.

Height

Stand against a wall. Measure from the floor to the top of the head without shoes.

Chest

Measure around the fullest part of the chest, under the arms. Keep tape parallel to the floor.

Waist

Measure around the natural waistline (narrowest part of the torso), relaxed.

Inseam

Measure from the crotch to the floor along the inner leg. Best done with pants they fit well.

Major Brand Size Equivalents

AgeCarter'sH&MOld NavyGapNike
0–3 months0-3M56-620-3M0-3M0-3M
3–6 months3-6M62-683-6M3-6M3M
6–9 months6-9M68-746-9M6-9M6M
9–12 months9-12M74-809-12M9-12M9M
12–18 months12-18M80-8612-18M12-18M12M
18–24 months18-24M86-9218-24M18-24M18M
2 years2T922T2T/2Y2T
3 years3T983T3T/3Y3T
4 years4T1044T4T/4Y4
5–6 years5/5T110-11655YXS

Brand size charts change. Always verify with the official brand chart before purchasing, especially for seasonal collections.

Smart Buying Tips

  • •Buy one size up for seasonal items (winter coats, boots) — children grow fast and you want the item to last the season.
  • •For online purchases, always check the brand's specific measurement chart, not just the age label.
  • •Natural fibers (cotton, wool) shrink more than synthetic blends — factor this in when buying close-to-fit.
  • •Check reviews for sizing: 'runs small' or 'runs large' comments are often the most reliable size guide.
  • •For gifting, ask about the child's height rather than age — it's a much more useful number.

Frequently Asked Questions

Why do kids' clothing sizes vary so much between brands?

Children's clothing in the US has no standardized sizing system. Each brand creates its own measurements. A 3T in Carter's may fit differently from a 3T in H&M or Old Navy. This is why measuring your child and checking brand-specific charts is always more reliable than relying on age labels alone.

What is the difference between 2T and size 2?

2T ('toddler') is designed for children still in diapers, with a roomier seat, shorter inseam, and higher waist. Size 2 (or '2') is cut slimmer for post-diaper-training children. They cover roughly the same height range but fit differently. Most brands transition from T sizes to numeric sizes around age 3–4.

Why does EU clothing sizing use numbers like 86, 92, 98?

EU clothing sizes are based on the child's height in centimeters. EU 86 means the garment is designed for a child approximately 86 cm tall. This makes EU sizing more intuitive and consistent across brands than US age-based labels.

How do I know if my child fits a size or needs to size up?

Measure your child's height and compare it to the height range for the size. When between sizes, generally size up — especially for tops and outerwear. For bottoms, waist and inseam measurement matters more than height. Always prioritize height over age when choosing a size.

What about 'slim', 'regular', and 'husky or plus' fits?

Many US brands offer slim, regular, and husky/plus in the same numeric size. Slim is for children at lower weight percentiles for their height; regular is the standard; husky is for children with a higher waist-to-height ratio. These fits are most common in sizes 4–14.

When should I stop using age ranges and go by measurements?

As soon as your child is no longer tracking 'average' for their age in height or weight. Children who are tall-for-age need a larger size label; children who are short or lean for age need a smaller one. By age 3, measuring height and comparing to the chart is more reliable than the age label.

Do I need to wash clothes before first use and does that affect sizing?

Yes — always pre-wash children's clothing before first use to remove manufacturing chemicals. Most children's garments shrink slightly after the first wash (5–10% for cotton). This is another reason to buy slightly larger, especially for natural fibers. Check the care label for washing instructions.

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