Baby Clothing Sizing Guide by Age: What Australian Parents Need to Know

One of the most common questions new parents ask is: what size should I buy? Baby clothing sizes can be confusing — different brands use different systems, and babies grow at their own pace. This guide breaks it down so you can shop with confidence.

How Baby Clothing Sizes Work in Australia

Australian baby clothing is generally sized by age (e.g. 000, 00, 0, 1) or by weight and height. Here's a general guide:

• 000 (0–3 months) — suits newborns up to around 6 kg and 62 cm
• 00 (3–6 months) — suits babies around 6–8 kg and 62–68 cm
• 0 (6–12 months) — suits babies around 8–10 kg and 68–76 cm
• 1 (12–18 months) — suits toddlers around 10–12 kg and 76–86 cm
• 2 (18–24 months) — suits toddlers around 12–14 kg and 86–92 cm

Keep in mind these are guides only — every baby is different! If your baby is between sizes, it's usually better to size up so they get more wear out of each piece.

Tips for Buying the Right Size

• Buy ahead: Babies grow fast. Buying one size up means more wear time, especially for gifts.
• Check the weight guide: Weight is often a more reliable indicator than age.
• Consider the season: If you're buying for a future season, factor in how old your baby will be then.
• Gifting a newborn? Skip the 000 — many babies outgrow it within weeks. A 00 or 0 is often more practical.

Shopping by Age Group

Browse our full range of baby and kids clothing at Bumblebeez Kidz Boutique, where every piece is chosen with comfort, quality, and little ones in mind. Not sure where to start? Our New Baby Gifts collection is a great place to find thoughtfully sized bundles and essentials for newborns.