UK to US Child Clothing Size Converter
Instantly convert UK child clothing sizes to US and EU equivalents. Free, accurate kids’ size chart factoring in age, height, and weight for the perfect fit.
Find the Perfect Fit
Select your child’s current UK clothing size and build type below to get an instant, precise conversion to US and EU sizes, along with recommended height and weight ranges.
Child’s Details
Enter the known UK size to see international equivalents
Size Conversion Results
International equivalents & fit metrics
Common UK to US Kids Size Chart
A quick-look reference table for the most common child clothing size conversions, including approximate height and weight guidelines.
| UK Size | US Size Equivalent | Age Range | Height (cm) |
|---|---|---|---|
| 0-3 Months | 0-3 Months | 0-3 mo | 50 – 60 cm |
| 3-6 Months | 3-6 Months | 3-6 mo | 60 – 68 cm |
| 6-9 Months | 6-9 Months | 6-9 mo | 68 – 74 cm |
| 9-12 Months | 9-12 Months | 9-12 mo | 74 – 80 cm |
| 1-2 Years | 12-18M / 2T | 1-2 yr | 80 – 86 cm |
| 2-3 Years | 2T – 3T | 2-3 yr | 86 – 98 cm |
| 3-4 Years | 3T – 4T | 3-4 yr | 98 – 104 cm |
| 4-5 Years | 4 – 5 | 4-5 yr | 104 – 110 cm |
| 5-6 Years | 5 – 6 | 5-6 yr | 110 – 116 cm |
| 6-7 Years | 6 – 7 | 6-7 yr | 116 – 122 cm |
| 7-8 Years | 7 – 8 | 7-8 yr | 122 – 128 cm |
| 8-9 Years | 8 – 9 | 8-9 yr | 128 – 134 cm |
| 9-10 Years | 9 – 10 | 9-10 yr | 134 – 140 cm |
| 10-11 Years | 10 – 11 | 10-11 yr | 140 – 146 cm |
| 11-12 Years | 12 | 11-12 yr | 146 – 152 cm |
| 12-13 Years | 12 – 13 | 12-13 yr | 152 – 158 cm |
| 13-14 Years | 14 | 13-14 yr | 158 – 164 cm |
| 14-15 Years | 14 – 16 | 14-15 yr | 164 – 170 cm |
Kids Clothing Sizes FAQ
Everything you need to know about converting UK child clothing sizes to US and international equivalents.
UK and US child clothing sizes are similar but not identical. US sizes often use ‘T’ (Toddler) for ages 2-4 (e.g., 2T, 3T, 4T), whereas UK sizes typically use year ranges (e.g., 2-3 Years, 3-4 Years). For older children, US sizes may run slightly larger in width, while UK sizes are often cut slightly slimmer.
If your child is between sizes, it is generally recommended to size up, especially for younger children who grow quickly. If your child has a taller or slimmer build, use our fit recommendation tool to adjust the sizing advice accordingly.
Yes, for babies aged 0-24 months, UK and US clothing sizes are virtually identical. Both regions typically label baby clothes by age ranges (e.g., 0-3 Months, 3-6 Months) and corresponding height/weight metrics.
Measure your child’s height from the top of the head to the floor without shoes. For weight, use a standard bathroom scale. For chest and waist, measure around the fullest part of the chest and the natural waistline, keeping the tape measure snug but not tight.