Ralph Lauren Baby sizes 0 - 9 month
| Approximate age | Child's height | Child's weight |
|---|---|---|
| Newborn | up 53 cm | up to 4 kg |
| 3 month | 53-60 cm | 4-6 kg |
| 6 month | 62-68 cm | 6-8 kg |
| 9 month | 70-74 cm | 9-10 kg |
| 12 month | 75-79 cm | 10-11 kg |
| 18 month | 80-83 cm | 11-12 kg |
| 24 month | 85-90 cm | 12-13 kg |
Ralph Lauren Girls sizes 2 - 16 year
| Approximate age | Ralph Lauren sizes | Child's height |
|---|---|---|
| 2 year | 2T | 88-93 cm |
| 3 year | 3T | 94-100 cm |
| 4 year | 4T | 102-108 cm |
| 5 year | 5 | 109-116 cm |
| 6 year | 6 | 117-123 cm |
| 6 year | 6X | 124-128 cm |
| 7 year | S | 129-130 cm |
| 8-10 year | M | 132-140 cm |
| 12-14 year | L | 142-153 cm |
| 16 year | XL | 154-158 cm |
Ralph Lauren Boys sizes 2 - 16 year
| Approximate Age | Ralph Lauren sizes | Child's height |
|---|---|---|
| 2 year | 2T | 88-93 cm |
| 3 year | 3T | 94-100 cm |
| 4 year | 4T | 102-108 cm |
| 5 year | 5 | 109-116 cm |
| 6 year | 6 | 117-123 cm |
| 7 year | 7 | 124-128 cm |
| 8 year | S | 132-137 cm |
| 10-12 year | M | 138-149 cm |
| 14-16 year | L | 150-161 CM |
| 16+ year | XL | 163-174 cm |
Ralph Lauren Pre-walker shoes sizes
 EU |  UK |  USA | Approximate age |
|---|---|---|---|
| 15 | 00 | 0 | Newborn |
| 16 | 0.5 | 1 | 0-3 month |
| 17 | 1.5 | 2 | 3-6 month |
| 18 | 2.5 | 3 | 6-9 month |
| 19 | 3.5 | 4 | 9-12 month |
Ralph Lauren Junior shoes sizes
| EU | UK | USA | Approximate age |
|---|---|---|---|
| 20 | 4 | 4.5 | 9-12 month |
| 21 | 4.5 | 5 | 12-18 month |
| 22 | 5.5 | 6 | 18-24 month |
| 23 | 6 | 6.5 | 2 year |
| 24 | 7 | 7.5 | 2 year |
| 25 | 8 | 8.5 |
3 year |
| 26 | 9 | 9.5 |
4 year |
| 27 | 9.5-10 | 10-10.5 | 5 year |
| 28 | 11 | 11.5 | 5 year |
| 29 | 11.5 | 12 | 6 year |
| 30 | 12 | 12.5 | 7 year |
| 31 | 13 | 13.5 | 8 year |
| 32 | 1 | 1.5 | 8 year |
| 33 | 2 | 2.5 | 9 year |
| 34 | 2.5 | 3 | 10 year |
| 35 | 3.5 | 4 | 11 year |
| 36 | 4 | 4.5 | 12 year |
| 37 | 4.5 | 5 | 13 year |
| 38 | 5 | 5.5 | 14 year |
| 39 | 5.5 | 6 | 15 year |
| 40 | 6.5 | 7 | 16 year + |