Girls between 6 and 14 grow at varying speeds, and almost never proportionally. Length outpaces width. Then width catches up. A kid who was a size 8 at the start of term can be a size 10 by mid-term. Here is how to size girls activewear when she is growing fast, so you are not replacing it every six weeks.
Measure Her Now, Not Last Season
The single biggest mistake is buying the same size as last time without checking. Girls' bodies change unevenly. The rise can grow before the inseam. A nine-year-old can add 10cm of leg length in a single growth spurt.
Before ordering, take three measurements. Do them in underwear, standing straight, without shoes.
- Chest: around the fullest part, tape sitting flat but not tight.
- Waist: at the natural waist, not the hip bone.
- Hip: around the fullest part of the seat, roughly 20cm below the waist.
Compare those numbers to the size chart on each product, not to the age on the label. Age labels are a guide only. Fit is what matters.
How to Read an Australian Girls Activewear Size Chart
Australian sizing for girls activewear generally runs from size 4 through to size 16, aligned to height and chest measurements rather than weight. If she sits between two sizes, go up. Activewear with a snug fit compresses slightly, and a size too small will restrict movement and wear out faster at the seams.
For dance specifically, leotard sizing works differently from general activewear. Leotards are cut to sit close to the body, so the chest measurement takes priority. Check our guide on choosing the right activewear for dance, gym and sports if you are unsure which cut suits the activity.
Waistbands with a wide, flat elastic are more forgiving across a growth spurt than narrow drawstring styles. Look for that in bike shorts and training leggings especially.
Buy for Where She Is Heading, Not Where She Is Now
If she is mid-spurt, sizing up one is usually the right call. Most quality activewear has enough structure to stay in place on a slightly slimmer frame. A longer leg length on bike shorts does not affect performance. A top that pulls across the shoulders mid-cartwheel does.
For classes she attends two or three times a week, you need at least two sets in rotation. That means wash cycles do not push you into buying replacements ahead of schedule. Knowing how to wash girls activewear properly also extends the life of each piece significantly. Cold water, inside out, no fabric softener.
Fabrics with four-way stretch hold their shape better across a size transition. Look for polyester-spandex blends or nylon-spandex blends. These move with the body and return to shape after washing, which matters when a garment needs to last six months rather than six weeks.
Signs the Current Size Is Done
You do not always need a tape measure to know she has outgrown something. Watch for these signs during class or training.
- The waistband rolls down or sits below the natural waist without being pushed.
- Bike shorts ride up at the inner thigh and do not recover.
- The back of a crop top pulls away from the lower back during forward bends.
- Shoulder seams sit off the shoulder rather than at the edge.
- She is pulling at her clothes mid-activity to readjust.
Any one of those means it is time to size up. Clothes that fit poorly are a distraction during class and can affect how confidently she moves.
Sustainable Choices Make Fast Growth Less Expensive
Buying well matters more when you are replacing things often. Garments made from recycled or responsibly sourced fabrics do not cost more to buy but they do tend to hold their construction better over repeated washes. If sustainability is part of how your family makes purchasing decisions, it is worth understanding what to actually look for in eco-friendly girls activewear before you buy, so the label matches the reality.
Passing activewear on to a younger sibling or through a dance school swap is also easier when the garment has been looked after and sized correctly from the start. A piece that was never overstretched or under-washed has real life left in it at the end of a season.
Find the Right Fit in Our Range
Every product in our girls activewear range includes a detailed size chart with chest, waist and hip measurements. If you have her measurements ready, sizing takes two minutes. Filter by activity, fabric or size to find what suits her training schedule and growth stage right now.
If you are still unsure, contact the team directly. Twenty years of fitting dancers means we can help you work out the right size from measurements alone, even if she is between sizes.
