Get to grips with Grass & Air sizes with their handy boys’ and girls’ size chart for the UK.
The below measurements for the little and older kids clothing ranges are body sizes and not garment size measurements. To determine which age range is best to buy for your child please measure them using our size guide below.
If your child has a chest measurement of 50cm then they will fit into the 18-24 months size range.
Age |
12-18 Months |
18-24 Months |
2-3 years |
3-4 years |
Height |
76-83 | 83-90 | 90-98 | 98-104 |
Chest |
47-49 | 49-51 | 51-54 | 54-56 |
Waist |
45-48 | 48-50.5 | 50.5-52 | 52-53.5 |
All measurements in CM
Age |
4-5 Years |
5-6 Years |
7-8 years |
9-10 years |
Height |
104-110 | 110-116 | 122-128 | 134-140 |
Chest |
56-58 | 58-61 | 63-66 | 69-72 |
Waist |
53.5-55 | 55-56 | 57-59 | 61-63.5 |
All measurements in CM
UK |
Inf 3 | Inf 4 | Inf 5 | Inf 6 | Inf 7 | Inf 8 | Inf 9 | Inf 10 | Inf 11 | Inf 12 | Inf 13 |
EU |
19 | 21 | 22 | 23 | 24 | 25 | 27 | 28 | 29 | 30 | 31 |
US |
4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 1 |
All measurements in CM
UK |
Jun 1 | Jun 2 | Jun 3 | Jun 4 | Jun 5 |
EU |
32 | 34 | 36 | 37 | 38 |
US |
2 | 3 | 4 | 5 | 6 |
All measurements in CM
UK |
Inf 4 | Inf 5 | Inf 6 | Inf 7 | Inf 8 | Inf 9 | Inf 10 | Inf 11 | Inf 12 | Inf 13 |
EU |
21 | 22 | 23 | 24 | 25 | 27 | 28 | 29 | 30 | 31 |
US |
5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
Insole Length |
14.3 | 14.7 | 15.3 | 16 | 16.7 | 18 | 18.7 | 19.3 | 20 | 20.8 |
All measurements in CM
If your child is in-between sizes we always recommend going for the bigger size. You can even fill out the welly with our warm and cosy Welly Socks!