My child is between sizes on the chart. How do I pick the right one?

Go with the larger size, especially if your child is growing fast or the clothing isn't stretchy. For outerwear like jackets and coats, sizing up gives room for layering underneath. For fitted items like t-shirts, the smaller size works if your child is at the lower end of the range. Also check the retailer's return policy before ordering, since international returns can take a while.

How reliable are age-based children's clothing sizes across different countries?

They're a rough guide at best. Kids the same age can vary by several inches in height and weight, and brands within the same country don't always agree on sizing either. Age-based systems (US, UK, Australian) give you a ballpark, but your child's actual height and chest measurements are more reliable. That's why the European system, which uses height in centimeters, tends to be more consistent.

Can I use this chart for all types of children's clothing?

It works well for everyday items: jackets, coats, trousers, t-shirts, blouses, and sweaters. Specialty clothing like formal wear, sports uniforms, and swimwear often uses brand-specific sizing that doesn't follow standard conversion charts. For those, check the brand's own size guide and compare it to your child's measurements.

Why are European children's sizes based on height instead of age?

Because height is a more consistent predictor of how clothing fits than age alone. Two 6-year-olds can easily differ by 10 cm in height. By tying sizes to height ranges (like 110-116 cm or 122-128 cm), European sizing gives you a better shot at the right fit without needing to know the child's exact age. If you know your child's height in centimeters, the European column is often the most useful one in the chart.

What does the "T" in US children's sizes like 2T, 3T, and 4T stand for?

The "T" stands for toddler. These sizes (2T, 3T, 4T) are cut differently from regular kids' sizes — they're wider through the middle to accommodate diapers and have shorter inseams. Once a child is out of diapers and outgrows 4T, they move into regular numbered sizes (5, 6, 7, etc.), which are slimmer through the waist and longer in the legs.

What's the best way to buy children's clothing from international retailers online?

Measure your child first: height, chest, and waist. Compare those numbers directly to the brand's size chart rather than relying solely on a conversion table. Read customer reviews — parents usually mention if items run big or small. And always check the return policy before ordering, since sending things back internationally can be expensive.

Children's International Size Conversion Chart

Convert children's clothing sizes between US, UK, European, and Australian sizing systems. Covers jackets, coats, trousers, t-shirts, blouses, and sweaters for ages 2 to 12.

Last updated: February 23, 2026

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International Conversion Chart for Children's Jackets, Coats, Trousers, T-Shirts, Blouses & Sweaters

Convert children's clothing sizes between international sizing systems. Click any row to highlight equivalent sizes.

US, UK, and Australian sizes are age-based. European sizes are based on the child's height in centimeters.

US	UK	Europe (cm)	Australia
2T	18-24 m	86-92	2
3T	2-3	92-98	3
4T	3-4	98-104	4
5	4-5	104-110	5
6	5-6	110-116	6
7	6-7	116-122	7
8	7-8	122-128	8
9	8-9	128-134	9
10	9-10	134-140	10
11	10-11	140-146	11
12	11-12	146-152	12

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How to Measure Your Child

Height

1.Have your child stand straight against a wall with bare feet, heels touching the wall.
2.Place a flat object (like a book) on top of their head, pressing gently against the wall.
3.Mark where the bottom of the object meets the wall.
4.Measure from the floor to the mark in centimeters. European sizes are based on this number.

Chest

1.Have your child stand with arms relaxed at their sides.
2.Wrap a soft tape measure around the fullest part of the chest, just under the armpits.
3.Keep the tape level and snug but not tight.
4.Read the measurement in inches or centimeters.

Waist

1.Find your child's natural waistline, usually the narrowest part of the torso.
2.Wrap the tape around the waist, keeping it level.
3.Leave enough room to fit a finger between the tape and the body.
4.Read the measurement while the child breathes normally.

Tips for Buying Children's Clothing Internationally

Use height, not just age

Two 5-year-olds can differ by several inches. European sizes are based on height in centimeters, which is more reliable than age alone. Measure your child and match to the height range in the chart.

Size up for growing room

Kids grow fast. If your child is near the top of a size range, go with the next size up, especially for coats and outerwear that need to last through a season or two.

Know what the "T" means in US sizes

In US sizing, the "T" stands for toddler (2T, 3T, 4T). These sizes are cut with extra room for diapers and movement. Once your child is out of diapers and past size 4T, they move into regular kids' sizes (5, 6, 7, etc.).

European sizes are the most precise

Since European children's sizes are tied directly to height in centimeters, they tend to be more consistent across brands than age-based systems. If you know your child's height, the European column gives you the most reliable conversion.

Check the brand's own size guide

Conversion charts are a starting point. Brands within the same country can differ by a full size depending on their fit and target age group. When buying online, compare your child's actual measurements to the brand's chart.

Read reviews for fit notes

Other parents often mention whether items run small, large, or true to size. This is especially helpful for international brands where you're less familiar with the fit.

FAQ on Children's International Size Conversion Chart

Figure out which sizing system your retailer uses (US, UK, European, or Australian), then find your child's current size in that column and read across the row. If your child wears a US 6, for instance, that's a UK 5-6, European 110-116 cm, and Australian 6. Keep in mind that US and UK sizes are based on age, while European sizes are based on height, so a tall 4-year-old might need a larger European size than their age suggests.

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