In Australian baby clothing, size 1 typically refers to toddlers around 12 to 18 months old, often correlating to a height of about 84 cm (33 inches) and a weight around 10-12 kg (22-26.5 lbs), but it's best to check the specific brand's size chart, as sizes vary slightly between retailers.
Sizes for baby clothes are typically based on the baby's age in months, with the most common sizes being newborn, 0-3 months, 3-6 months, 6-9 months, 9-12 months, and 12-18 months.
Toddler and little kid shoes run from sizes 0 to 13. Once you get into big kid shoe sizes, the numbers start back over at 1. So, keep in mind that when your child outgrows their size 13 shoes, the next size up is a kid's or youth 1 (1Y).
For a 4-year-old in Australia, the typical shoe size is around AU/UK 9 or 10, but it varies, often falling between Size 9 (approx. 3.5-4 yrs) and Size 10 (approx. 4-4.5 yrs), with foot length around 16.6cm to 17.4cm; always measure their feet and check the specific brand's chart as sizes differ.
12-18 Months | Size 1
Size 1 is suitable for babies around the age of 1 year old, with a recommended age range of up to 18 months. This size fits babies weighing up to 12 kg and measuring 84 cm.
Once babies outgrow newborn baby gifts, it's on to size 00, for 3-6 months. Babies weighing 5-7kg and measuring up to 68cm will suit size 00. Then there are size 0 baby clothes for the 6-12 month age range, fitting babies with a weight of 7-9kg and a height up to 76cm.
In international sizing standards, size 0 corresponds to an extremely petite frame, typically classified as extra-small (XS). To put it into perspective, someone wearing a size 0 usually has measurements around a bust of approximately 31 inches, a waist measuring about 23.5 inches, and hips at roughly 34 inches.
One Size is actually an average size and not a universal fit. For example, instead of three sizes S, M and L, manufacturers only produce size M. The statement "one size fits all" is somewhat misleading, as only people whose clothing size is within this average can wear the clothes well. So, one size doesn't fit all!