UK Baby Shoe Size Converter
Instantly find the exact foot length in centimetres for any UK infant or toddler shoe size. The ultimate two-way lookup tool for parents and caregivers.
Convert Shoe Sizes
Select your known UK baby shoe size or foot length in cm below. The calculator instantly syncs to show you the exact equivalent, helping you buy the perfect fit.
Baby Shoe Size Converter
Seamlessly switch between UK sizes and metric foot length.
Understanding Baby Shoe Sizes
Key concepts for healthy foot development
The Metric Standard
Centimetres (cm) represent the actual length of the foot. This is the most reliable way to buy shoes, as UK, US, and EU number systems can vary between different shoe manufacturers.
The “Wiggle Room” Rule
Babies’ feet grow incredibly fast. Always add 1 to 1.5 cm (about the width of an adult thumb) to your baby’s actual foot measurement to ensure comfortable, healthy growth.
Unisex Sizing
UK baby and infant shoe sizes are entirely unisex. A size 4 in boys’ shoes is the exact same length as a size 4 in girls’ shoes, though the width or style may differ.
Check Frequently
Between ages 0–2, babies can go up 2 to 3 shoe sizes per year. It is recommended to check their shoe fit every 2 to 3 months to prevent restricted foot development.
Complete Baby Shoe Size Chart
The definitive conversion chart for UK baby and infant shoes. Use this to verify your converter results or browse sizes quickly.
| UK Size | Foot Length (cm) | Approx. Age | EU Size (Approx) |
|---|---|---|---|
| 0 | 9.6 cm | 0 – 3 months | 16 |
| 1 | 10.3 cm | 3 – 6 months | 17 |
| 2 | 11.0 cm | 6 – 9 months | 18 |
| 3 | 11.6 cm | 9 – 12 months | 19 |
| 4 | 12.3 cm | 12 – 15 months | 20 |
| 5 | 13.0 cm | 15 – 18 months | 21 |
| 6 | 13.6 cm | 18 – 21 months | 22 |
| 7 | 14.3 cm | 21 – 24 months | 23 |
| 8 | 15.0 cm | 2 – 2.5 years | 24 |
| 9 | 15.6 cm | 2.5 – 3 years | 25 |
| 10 | 16.3 cm | 3 – 3.5 years | 26 |
| 11 | 17.0 cm | 3.5 – 4 years | 27 |
| 12 | 17.6 cm | 4 – 4.5 years | 28 |
| 13 | 18.3 cm | 4.5 – 5 years | 29 |
Baby Shoe Size FAQ
Answers to the most frequently asked questions about measuring and buying baby shoes.
Place a piece of paper on a hard floor and have your baby stand on it with their heel gently against a wall. Mark the tip of their longest toe, then measure the distance from the wall to the mark in centimetres. Add 1–1.5 cm for growing room to find the ideal shoe size.
A UK baby shoe size 4 corresponds to a foot length of approximately 12.3 cm. This size is typically suitable for babies aged around 12 to 15 months, though individual growth rates vary significantly.
Yes. Babies’ feet grow rapidly, and they need room to wiggle their toes. It is generally recommended to add 1 to 1.5 cm (about a thumb’s width) to your baby’s actual foot length when selecting a shoe size to ensure comfort and healthy foot development.
Yes, UK baby and infant shoe sizes are unisex. A size 4 in boys’ shoes is the same length as a size 4 in girls’ shoes, though the width, arch support, or style of the shoe may vary slightly between different brands.
Between ages 0–2, babies can go up 2 to 3 shoe sizes per year. It is highly recommended to check their shoe fit every 2 to 3 months. From ages 2 to 5, checking every 3 to 4 months is a good rule of thumb.