SONIA RYKIEL PARIS Baby sizes 3 - 18 month
| Approximate age | Child's height |
| 3 month | 60 cm |
| 6 month | 67 cm |
| 12 month | 74 cm |
| 18 month | 81 cm |
SONIA RYKIEL PARIS Junior sizes 2 - 14 year
| Approximate age | Child's height | Child's chest (around) | Child's waist (around) |
| 2 year | 83-86 cm | 52 cm | 48 cm |
| 4 year | 95-104 cm | 56 cm | 52 cm |
| 6 year | 111-116 cm | 60 cm | 54 cm |
| 8 year | 123-128 cm | 64 cm | 56 cm |
| 10 year | 134-140 cm | 68 cm | 58 cm |
| 12 year | 141-152 cm | 75 cm | 63 cm |
| 14 year | 155-162 cm | 78 cm | 65 cm |