Australian Baby Clothing Size Guide | Rai & Co
Australian baby clothing sizes differ from US and European sizing, so it's worth knowing what to look for before you buy. Sizes can also vary slightly between brands, so use this guide as a starting point and always check the weight and height ranges below.
Size chart table:
| Size Label | Age (approx) | Weight (kg) | Height (cm) |
|---|---|---|---|
| 0000 | Newborn | Up to 4kg | Up to 56cm |
| 000 | 0-3 months | 4-6kg | 56-62cm |
| 00 | 3-6 months | 6-8kg | 62-68cm |
| 0 | 6-12 months | 8-10kg | 68-76cm |
| 1 | 12-18 months | 10-12kg | 76-82cm |
| 2 | 18-24 months | 12-14kg | 82-88cm |
| 3 | 2-3 years | 14-16kg | 88-98cm |
| 4 | 3-4 years | 16-18kg | 98-104cm |
| 5 | 4-5 years | 18-20kg | 104-110cm |
| 6 | 5-6 years | 20-22kg | 110-116cm |
When in doubt, size up, babies grow fast.
Rai & Co sizing note:
Our onesies run true to size. For the first 4-6 weeks, start with 0000. Most babies move to 000 around 4-8 weeks.
Shop our collections:
Browse our Baby Onesies collection or shop by fabric: Ribbed and Apple.
Frequently Asked Questions (FAQs)
-
What size is a newborn in Australia?
Newborns typically wear 0000, which fits babies up to 4kg and 56cm.
-
How long does a baby stay in 0000?
Around 4-6 weeks for an average-sized baby, though it varies. -
Should I buy up a size?
Yes, especially for gifts. 000 is a safer choice as it gives more room to grow. -
Do Rai & Co sizes run small or large?
True to size. Our fold-off feet also add a little extra room, so your baby won't be cramped as they grow.