Getting the size right for girls clothing is one of the most common challenges parents face — especially when shopping online. Every brand sizes slightly differently, and kids grow at their own pace. This complete size guide covers girls clothing from 2T through 14 years, with US, UK and EU conversions, at-home measuring tips, and advice on what to do when your child falls between sizes. Bookmark this page — you'll come back to it every season.
How to Measure Your Child at Home
Before checking any size chart, take three measurements. All you need is a soft measuring tape.
Height
Stand your child against a wall without shoes. Mark the top of her head and measure from the floor to the mark. This is the most reliable sizing reference for kids clothing — more reliable than age alone.
Chest
Measure around the fullest part of the chest, keeping the tape parallel to the floor. Keep it snug but not tight.
Waist
Measure around the natural waistline — just above the belly button. This matters most for trousers, skirts, and sets.
Write these three numbers down before you start shopping. Age is a guideline only — two children the same age can easily differ by a full size or more.
Girls Clothing Size Chart — US, UK & EU
| US Size | UK Size | EU Size | Height (cm) | Height (inches) | Approx. Age |
|---|---|---|---|---|---|
| 2T | 2 | 92 | 86–92 cm | 34–36" | 2 years |
| 3T | 3 | 98 | 92–98 cm | 36–39" | 3 years |
| 4T / 4 | 4 | 104 | 98–104 cm | 39–41" | 4 years |
| 5 | 5 | 110 | 104–110 cm | 41–43" | 5 years |
| 6 | 6 | 116 | 110–116 cm | 43–46" | 6 years |
| 7 | 7 | 122 | 116–122 cm | 46–48" | 7 years |
| 8 | 8 | 128 | 122–128 cm | 48–50" | 8 years |
| 10 | 9–10 | 134–140 | 128–140 cm | 50–55" | 9–10 years |
| 12 | 11–12 | 146–152 | 140–152 cm | 55–60" | 11–12 years |
| 14 | 13–14 | 158–164 | 152–164 cm | 60–65" | 13–14 years |
These measurements are general guidelines. Always check the individual product size chart where available.
Toddler Sizes — 2T to 4T
Toddler sizing uses "T" to distinguish from older kids sizes — 2T, 3T, and 4T. The key difference between 4T and size 4 is the cut: 4T has a slightly roomier fit around the waist and bottom to accommodate nappies or training pants. Once your child is fully toilet trained, you can move to size 4 which has a slimmer, more structured fit.
At this age, height is the most reliable guide. A 2-year-old who is tall for her age may fit 3T comfortably, while a smaller 3-year-old may still be in 2T. Always measure first.
Browse our girls clothing for 2 to 6 years — including sets, dresses and rompers in sizes from 2T upwards.
Little Girls Sizes — 4 to 6 Years
From size 4 onwards, kids clothing moves away from "T" sizing and uses standard numbers. Fits become slightly more structured and less boxy. At this stage, girls start to develop stronger preferences about what they wear — so involving her in the choice becomes increasingly important (and entertaining).
Two-piece sets and dress sets are the most popular category for this age group. They're easy to size, simple to mix and match, and come in the playful prints and colours that little girls love.
Tips for sizing this age group:
- If she's between sizes, size up — kids grow fast and you'll get more wear out of the larger size
- Check waist measurements for bottoms — height alone doesn't always predict waist fit
- Elasticated waistbands give more flexibility across sizes
Older Girls Sizes — 6 to 14 Years
From size 6 upwards, fits vary more between brands. Some brands cut slimmer, others more generously. At this age, chest and waist measurements become more important than height alone — especially for dresses and fitted tops.
Girls in this age range are also more fashion-aware, so the style of the garment matters as much as the fit. Oversized fits are popular and intentional in many styles — if in doubt, check the product description for fit notes.
Common sizing questions for this age group:
- Size 10 vs 10–11: Some brands label this as 10, others as 10–11. They refer to the same height range (128–140cm). Check the cm measurement rather than the number label.
- Between sizes 12 and 14: If the chest fits size 12 but the height needs size 14, go with the larger size and adjust with a belt or tie if needed.
Shop our girls clothing for 6 to 14 years — on-trend styles for tweens updated every week.
What to Do When She's Between Sizes
This is the most common sizing challenge — and there's a simple rule: always size up, never size down. Kids grow into clothes; they don't shrink. A slightly larger size with an elasticated waist or adjustable ties will last far longer than something that fits perfectly today and is too small in six weeks.
For dresses and tops, length is usually more important than width — a dress that's slightly wide is fine, one that's too short won't work at all.
Washing & Shrinkage — Does It Affect the Size?
Cotton garments can shrink slightly after the first wash if washed in hot water. To maintain the size and shape of cotton clothing:
- Wash in cold or warm water (30°C / 86°F maximum)
- Avoid tumble drying on high heat — air dry or use a low heat setting
- Wash inside out to preserve print and colour
If you're buying cotton items and know they'll be washed frequently, it's worth sizing up one size to account for any minor shrinkage over time.
Frequently Asked Questions
What size does a 3-year-old girl wear?
Most 3-year-old girls wear a 3T or 98cm. However, height varies significantly at this age — always measure your child's height first and match it to the size chart rather than relying on age alone.
What is the difference between 4T and size 4 in girls clothing?
4T has a roomier cut around the waist and bottom to fit over nappies or training pants. Size 4 has a slimmer, more structured fit. Once your child is fully toilet trained, size 4 is usually the better fit.
How do I convert US girls sizes to UK sizes?
US and UK girls sizes are generally equivalent by number — US size 6 equals UK size 6. The most reliable conversion is to use the height in centimetres, which is consistent across US, UK and EU sizing.
What size is a 5-year-old girl in EU sizing?
A 5-year-old girl typically wears EU size 110, which corresponds to a height of 104–110cm. This is equivalent to US/UK size 5.
Should I size up or size down for girls clothing?
Always size up when in doubt. Children grow quickly, and a slightly larger size will last longer. Look for styles with elasticated waists and adjustable features for the best flexibility across sizes.
How often should I measure my child for clothing sizes?
Measure every 3–4 months for toddlers and every 6 months for older children. Growth spurts can happen quickly, and last season's size may not fit at all by the time the weather changes.
Shop Girls Clothing by Age Group
Now that you have her measurements, finding the right fit is easy. At Tots America we organise our girls clothing by age group so you can shop directly in her size range — no guessing required.
- Girls clothing — 2 to 6 years — toddler and little girls styles
- Girls clothing — 6 to 14 years — tween and older girls styles
- Baby and newborn clothing — 0 to 24 months
- New arrivals — latest styles across all ages
Free shipping on all orders over $30. New styles added every week — shop Tots America.
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