Standard Baby Clothing Sizes Chart
| Baby's Weight | Baby's Height | Baby's Age | Size |
| Up to 4 kg | 47 cm - 55 cm | Newborn | 0000 |
| 4 kg - 6 kg | 55 cm - 60 cm | Up to 3 months | 000 |
| 6 kg - 8 kg | 60 cm - 70 cm | Up to 6 months | 00 |
| 8 kg - 10 kg | 70 cm - 75 cm | Up to 9 months | 0 |
| 10 kg - 11 kg | 75 cm - 80 cm | Up to 12 months | 1 |
| 12 kg - 14 kg | 80 cm - 90 cm | Up to 24 months | 2 |
Baby Clothes Sizes Chart for Different Brands
All the brands may not adhere to the standard size for baby clothes. Hence, sizes meant for the babies of same age, height and weight may vary for two different brands.
| Brand | Newborn | 0 - 3 months | 3 - 6 months | 6 - 9 months | 9 - 2 Months |
| GAP | None | 56 cm/5 kg | 65 - 66 cm/5 - 7 kg | 66 - 70 cm/7 - 10 kg | 66 - 70 cm/7 - 10 kg |
| Adams | 4 sizes from 44 - 62 cm/1.6 - 5 kg | None | 68 cm/6.5 kg | 74 cm/8 kg | 80 cm/9 kg |
| Vertbaudet | 50 cm/3.3 kg | 54 - 60 cm/4 - 6 kg | 67 cm/7 - 8 kg | 71 cm/8 - 9 kg | 74 cm/9 - 10 kg |
| Petit Bateau | 50 cm | 54 cm/up to 6 kg | 60 cm/6 kg | 67 cm/8 kg | 74 cm/10 kg |
| Mothercare | 56 cm/4.5 kg | 62 cm/6.5 kg | 68 cm/8 kg | 74 cm/9 kg | 80 cm |
| Babies R Us | 52 cm/3.5 kg | 52 - 62 cm/4.5 - 6.5 kg | 62 - 68 cm/6.5 - 8 kg | 68 - 74 cm/8 - 9.5 kg | 74 - 80 cm/8 - 11 kg |
| Next | 56 cm/4.5 kg | 56 - 62 cm/4.5 - 6 kg |
62 - 68 cm/6 - 8 kg | 68 - 74 cm/8 - 9.5 kg | 74 - 80 cm/9.5 - 11 kg |
How to Buy Right Size Baby Clothing
Baby clothes sizes and age are indeed related, however, the size of the baby clothing is mainly determined by the height and weight of the baby. Hence, to be on a safer side, it is best to measure and weigh your baby. The above charts will help you to find out the right size for your baby according to her weight and height. If your baby falls somewhere between two sizes, it is always best to buy the larger size considering the scope for your baby's growth. Infant clothes sizes indeed come in standard format. But as every baby is unique and has a different growth rate, you will yourself have to figure out which size will fit your baby perfectly. Also, the nature of the fabric should be taken into account. Fabrics like cotton usually shrink after first wash, hence while buying cotton clothes always buy a size larger than you would for other fabrics.
Most mothers would agree that sizes on baby clothes are a mere number on the label and actually mean nothing. It is only through trial and error that you can find the right clothing size for your baby. To avoid spending too much on ill fitting baby clothes, always buy few baby clothes until you find the right size for your baby.